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()北师版六年级解方程练习200题

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()北师版六年级解方程练习200题(完整版)北师版六年级解方程练习200题(完整版)北师版六年级解方程练习200题PAGE第PAGE\*MERGEFORMAT28页共NUMPAGES\*MERGEFORMAT28页(完整版)北师版六年级解方程练习200题第PAGE\*MERGEFORMAT1页共NUMPAGES\*MERGEFORMAT25页 (1)x﹣=,(2)x××=,(3)﹣4x=,(4)8×2.5﹣2x=13.6(5)0.78:x=3:5,(6)1﹣20%x=0.4,(8)1÷(x﹣)=6,(9)2x﹣x=1....

()北师版六年级解方程练习200题
(完整版)北师版六年级解方程练习200 快递公司问题件快递公司问题件货款处理关于圆的周长面积重点题型关于解方程组的题及答案关于南海问题 (完整版)北师版六年级解方程练习200题PAGE第PAGE\*MERGEFORMAT28页共NUMPAGES\*MERGEFORMAT28页(完整版)北师版六年级解方程练习200题第PAGE\*MERGEFORMAT1页共NUMPAGES\*MERGEFORMAT25页 (1)x﹣=,(2)x××=,(3)﹣4x=,(4)8×2.5﹣2x=13.6(5)0.78:x=3:5,(6)1﹣20%x=0.4,(8)1÷(x﹣)=6,(9)2x﹣x=1.2,(10)9×3﹣1.7x=13.4,(11)x﹣25%x=24,(12)x﹣+0.2=, (13)0.6x+90%x=78,(14)20%x﹣2.4×3=0.8,(15)x﹣x=42,(16)0.6x+3×2.5=67.5,(17)1÷(x﹣0.45)=5,(18)x﹣2.25=8.25,(19):x=3:12,(20)x+0.8=5.6,(21)1.4:x=1:0.75,(22)x×(2﹣)=24,(23)4x﹣=3,(24)12x+7×0.3=20.1,(25)x+x=,(26)x:42=, (27)×0.5+x=,(28)0.8:=0.48:x,(29)χ﹣χ=,(30)42:=χ:(31)5x﹣0.4=75%,(32)6x﹣0.9=4.5,(33)2(x﹣3)=5.8,(34)1.6x=6.4,(35)4x﹣3×9=29,(36)16+8x=40,(37)x÷1.1=3,(38)+2x=,(39)×3﹣7x=1.04,(40)x﹣1﹣x=2,(41)x﹣x=14,(42)3x﹣x=,(43)=,(44)1.2:=,(45)=:,(46):=x:0.8,(47)x=+1,(48)1﹣25%X+25%x=+25%x,(49)=,(50)×X=,(51)5:8=x:32,(52)2x+3×0.9=24.9,(53)5.3x﹣2.9x=,(54)×(7﹣2.8x)=1.5,(55)x:0.3=:,(56)150%x+66=99(57)x+6﹣0.8x=16(58)(59)(60)3÷(X﹣)=1.3(61)(X+0.5):2=(X﹣4):,(62)X÷0.05=3.528,(63)2X﹣4×6=80,(64)4×4.5﹣3X=6.38,(65)4X﹣7.2=10,(66)11.5X+X=20,(67)3.8×12+15X=87.6,(68)6X+5=17,(69)0.6×(2.5+X)=4.2,(70):=X:, (71),(72)(73),(74)4(+x)=,(75)×0.25+x=, (76)x﹣,(77)200:6=x:,(78)4÷X=,(79)8(x﹣2)=2(x+7),(80):18%=, (81)﹣2x=,(82)x+x=46,(83):x=:,(84)=, (85)5(3x﹣4)﹣2(x﹣1)=5(2x﹣1)(86)=,(87)8(2X﹣7)=5(X+13),(88)3(x+4.5)=60,(89)1.6x+2.4=7.52,(90)3(x﹣0.8)=6.3,(91)28.4﹣5x=5.8, (92)x:=(93)+2x=,(94)x=15%,(95)x﹣x=,(96)x+50%x=6,(97):x=0.3:12,(98)4x+2(8﹣x)=26,(99)x﹣=0,(100)+x=1,(101)x×(+)=,(102),(103),(104)x﹣,(105)x×,(106)5x+35=650,(107)720÷3x=80,(108)3.6x﹣0.9x=8.1,(109)4×4.5﹣3x=6,(110)=,(111)6×3﹣1.8X=7.2,(112)÷x=,(113)x÷=42,(114)x+=,(115)7x÷3=8.19,(116)12:0.6=x:,(117)3(x+2)=4(x+1), (118)3x﹣70%x=9.2,(119)6+x=240,(120)22.5﹣0.4x=12.5,(121)x:3.5=4:2,(122)x﹣0.8x﹣6=16,(123):=x:8,(124),(125)x:15=:,(126)x+x=,(127)x×50%﹣x=5,(128)1﹣x=,(129)2.5+1x=3,(130)3x﹣2=4,(131)8.5﹣3x=2,(132)3÷x=4,(133)x﹣5%=17.54,(134):=:(4﹣x),(135)6x+31=49,(136)7x÷3=8.19,(137)32.8﹣9x=17.5,(138)x﹣0.36x=16,(139)6×7+3x=69,(140)6x+2x﹣56=0,(141)3x﹣0.45×4=2.7,(142)5.8x﹣4.6x=0.96,(143)8.4÷(9﹣x)=3,(144)3x÷1.2=8,(145)5x+28=71,(146)8.7﹣1.2x=3.9,(147)8x﹣2.6x=37.8,(148)0.75x﹣0.95×4=8.5,(149)54÷2+3x=72,(150)8x﹣2.6=37.8,(151)x÷=,(152)x+30%x=26,(153)7.8﹣3x=3.6,(154)6×3﹣1.8x=7.2,(155)10:x=4.5:0.8,(156):=x:,(157)X﹣7.65=4.64,(158)28.25﹣X=8.25,(159)X﹣(3.6+2.97)=12.42,(160)÷x=,(161)14.5=5.5,(162)x﹣80%x=48,(163)75%x﹣5×=6,(164)x﹣6.8=15.4,(165)1.9x=5.7,(166)4.3y﹣y=4.6,(167)5x+2.6=7.6,(168)x﹣1.5=12.9,(169)9x+5x=8.4,(170)6.8+3.2x=14.8,(171)5÷x=,(172)﹣x=,(173)4.5×﹣3x=1.5,(174)(1+25%)x=0.5,(175)x﹣40%x=9,(176)x×20%=15.2,(178)x﹣x=,(179)x÷75%=3,(180)4x﹣,(181):x=:4.5,(182)(x﹣4.5)×6=12.5,(183)27﹣17x=13.4,(184)9.6+3x=3.24×5,(185)2x+5=5x﹣7,(186)3(x﹣2)=2﹣5(x﹣2),(187)4x﹣3(20﹣x)+4=0,(188)﹣=1,(189)4x﹣5×6=12,(190)8x﹣3x=15.6,(191)30×(x÷4)=60,(192)7.2×0.5﹣3x=1.2, (193)5x﹣2.4×5=8,(194)+x=×2,(195)5x+2.4×15=66,(196)3.2x+2.8x-x=1,(197)2.5×16-8x=12,(198)9.6-3x=6.3,(199)5(x+6)=75,(200)x÷0.7+0.9×3=4,解方程专项练习200题 答案 八年级地理上册填图题岩土工程勘察试题省略号的作用及举例应急救援安全知识车间5s试题及答案 :(1)x﹣=,=,,x=;(2)x××=,x=,x×21=×21,x=12;(3)﹣4x=,﹣4x+4x=+4x,=+4x,÷4=4x÷4,x=.(4)8×2.5﹣2x=13.620﹣2x=13.6,13.6+2X=20,2X=6.4,x=3.2;(5)0.78:x=3:5,3x=0.78×5,3x=3.9,x=1.3 (6)1﹣20%x=0.4,1﹣20%x+20%x=0.4+20%x,0.4+20%x=1,0.4+20%x﹣0.4=1﹣0.4,20%x=0.6,20%x×=0.6×,x=3;(8)1÷(x﹣)=6,1÷(x﹣)×(x﹣)=6×(x﹣),1=6×(x﹣),6x﹣6×=1,6x﹣3=1,6x=4,6x÷6=4÷6,x=(9)2x﹣x=1.2,x(2﹣)=1.2,x=1.2,x÷=1.2÷,x=1;(10)9×3﹣1.7x=13.4,27﹣1.7x=13.4,27﹣1.7x+1.7x=13.4+1.7x,13.4+1.7x=27,13.4+1.7x﹣13.4=27﹣13.4,1.7x=13.6,1.7x÷1.7=13.6÷1.7,x=8(11)x﹣25%x=24,75%x=24,75%x÷75%=24÷75%,x=32;(12)x﹣+0.2=,x﹣0.6=,x﹣0.6+0.6=+0.6,x=,x÷=÷,x=1 (13)0.6x+90%x=78,1.5x=78,1.5x÷1.5=78÷1.5,x=52;(14)20%x﹣2.4×3=0.8,20%x﹣7.2=0.8,20%x﹣7.2+7.2=0.8+7.2,20%x÷20%=8÷20%,x=40;(15)x﹣x=42,x=42,x÷=42÷,x=252(16)0.6x+3×2.5=67.5,0.6x+7.5=67.5,0.6x+7.5﹣7.5=67.5﹣7.5,0.6x=60,0.6x÷0.6=60÷0.6,x=100;(17)1÷(x﹣0.45)=5,÷(x﹣0.45)×(x﹣0.45)=(x﹣0.45),x﹣2.4=1.6,x﹣2.4+2.4=1.6+2.4,x=4,x÷=4÷,x=(18)x﹣2.25=8.25,x﹣2.25+2.25=8.25+2.25,x=10.5;(19):x=3:12,3x=×12,3x÷3=9÷3,x=3(20)x+0.8=5.6,x+0.8﹣0.8=5.6﹣0.8,x=4.8,x×=4.8×,x=8.(21)1.4:x=1:0.75,x=1.4×0.75,x=1.05(22)x×(2﹣)=24,x×=24,x×÷=24÷,x=20;(23)4x﹣=3,4x﹣+=3+,4x=4,4x÷4=4÷4,x=1(24)12x+7×0.3=20.1,12x+2.1=20.1,12x+2.1﹣2.1=20.1﹣2.1,12x÷12=18÷12,x=1.5;(25)x+x=,x=,x×,x=;(26)x:42=,10x=42×,10x÷10=30÷10,x=3 (27)×0.5+x=,0.75+x=3.75,0.75+x﹣0.75=3.75﹣0.75,x=3,x÷=3÷,x=6;(28)0.8:=0.48:x,0.8x=×0.48,0.8x=0.2,0.8x÷0.8=0.2÷0.8,x=(29)χ﹣χ=,x=,x=,x=3;(30)42:=χ:x=42×,x=30,x=50;(31)5x﹣0.4=75%,5x﹣0.4+0.4=75%+0.4,5x÷5=1.15÷5,x=0.23 (32)6x﹣0.9=4.5,6x﹣0.9+0.9=4.5+0.9,6x=5.4,6x÷6=5.4÷6,x=0.9;(33)2(x﹣3)=5.8,2(x﹣3)÷2=5.8÷2x﹣3=2.9,x﹣3+3=2.9+3,x=5.9;(34)1.6x=6.4,1.6x÷1.6=6.4÷1.6,x=4;(35)4x﹣3×9=29,4x﹣27=29,4x﹣27+27=29+27,4x=56,4x÷4=56÷4,x=14;(36)16+8x=40,16+8x﹣16=40﹣16,8x=24,8x÷8=24÷8,x=3;(37)x÷1.1=3,x÷1.1×1.1=3×1.1,x=3.3(38)+2x=,+2x=,2x=,2x÷2=÷2,x=;(39)×3﹣7x=1.04,2.16﹣7x=1.04,2.16﹣7x﹣1.04=1.04﹣1.04,1.12﹣7x=0,7x÷7=1.12÷7,x=0.16;(40)x﹣1﹣x=2,x﹣1=2,x﹣1+1=2+1,x=3,x=3,x=18;(41)x﹣x=14,x=14,x=14,x=18;(42)3x﹣x=,x=,x=,x=;(43)=,2.4x=72×0.26,2.4x=18.72,2.4x÷2.4=18.72÷2.4,x=7.8;(44)1.2:=,x=1.2×5,x=6,x=6,x=9;(45)=:,x=18×,x=,x=,x=12;(46):=x:0.8,x=×0.8,x=0.04,x=0.2;(47)x=+1,x×=×,x=1 (48)1﹣25%X+25%x=+25%x,0.25x+0.25﹣0.25=1﹣0.25,0.25x=0.75,x=3;(49)=,0.25x=1.25×1.6,0.25x÷0.25=1.25×1.6÷0.25,x=8;(50)×X=,×X÷=,x=;(51)5:8=x:32,8x=5×32,8x÷8=5×32÷8,x=20(52)2x+3×0.9=24.9,2x+2.7=24.9,2x+2.7﹣2.7=24.9﹣2.7,2x÷2=22.2÷2,x=11.1;(53)5.3x﹣2.9x=,2.4x=,2.4x÷2.4=÷2.4,x=;(54)×(7﹣2.8x)=1.5,×(7﹣2.8x)=1.5,7﹣2.8x=2.1,7﹣2.8x+2.8x=2.1+2.8x,7﹣2.1=2.1+2.8x﹣2.1,4.9÷2.8=2.8x÷2.8,x=1.75;(55)x:0.3=:,x=0.3×,x=,x= (56)150%x+66=991.5x+66=991.5x=33x=22(57)x+6﹣0.8x=160.2x+6=160.2x=10x=50(58)x=14.4(59)0.55x=5.5x=10(60)3÷(X﹣)=1.33÷(X﹣)×(x﹣)=1.3×(x﹣),3=1.3x﹣0.78,3+0.78=1.3x﹣0.78+0.78,4.68=1.3x,4.68÷1.3=1.3x÷1.3,x=3.6;(61)(X+0.5):2=(X﹣4):,×(x﹣4)=(x+0.5)×,x﹣×4=x+×0.5,x﹣10﹣x=x+x,2.25x﹣10+10=0.125+10,2.25x÷2.25=10.125÷2.25,x=4.5(62)X÷0.05=3.528,X÷0.05×0.05=3.528×0.05,X=0.1764;(63)2X﹣4×6=80,2X﹣24=80,2X﹣24+24=80+24,2X=104,2X÷2=104÷2,X=52;(64)4×4.5﹣3X=6.38,18﹣3X=6.38,18﹣3X+3X=6.38+3X,6.38+3X=18,6.38+3X﹣6.38=18﹣6.38,3X=11.62,3X÷3=11.62÷3,X=;(65)4X﹣7.2=10,4X﹣7.2+7.2=10+7.2,4X=17.2,4X÷4=17.2÷4,X=4.3;(66)11.5X+X=20,12.5X=20,12.5X÷12.5=20÷12.5,X=1.6;(67)3.8×12+15X=87.6,45.6+15X=87.6,45.6+15X﹣45.6=87.6﹣45.6,15X=42,15X÷15=42÷15,X=2.8(68)6X+5=17,6x+5﹣5=17﹣5,6x÷6=12÷6,x=2;(69)0.6×(2.5+X)=4.2,0.6×(2.5+X)÷0.6=4.2÷0.6,2.5+x=7,2.5+x﹣2.5=7﹣2.5,x=4.5;(70):=X:,x=×,x÷=,x=0.6 (71),,,;(72),,,,;(73),,,(74)4(+x)=,+4x=,+4x﹣=﹣,4x=4,x=1;(75)×0.25+x=,0.2+x=,0.2+x﹣0.2=﹣0.2,x=,x= (76)x﹣,,,x=;(77)200:6=x:,6x=200×,6x÷6=480÷6,x=80 (78)4÷X=,4÷X×X=X,X=4,X÷=4÷,X=10;(79)8(x﹣2)=2(x+7),8X﹣16=2X+14,6X﹣16=14,6X=30,X=5;(80):18%=,X=0.18×6.5,X=1.17,X=7.8 (81)﹣2x=,﹣2x+2x=+2x,+2x=,+2x﹣=﹣,2x=,2x÷2=÷2,x=;(82)x+x=46,x(+)=46,x=46,x÷=46÷,x=40;(83):x=:,x=×,x=,x÷=÷,x=;(84)=,1.6x=6.4×2,1.6x=12.8,1.6x÷1.6=12.8÷1.6,x=8 (85)5(3x﹣4)﹣2(x﹣1)=5(2x﹣1)15x﹣20﹣2x+2=10x﹣5,13x﹣18=10x﹣5,13x﹣18﹣10x=10x﹣5﹣10x,3x﹣18=﹣5,3x﹣18+18=﹣5+18,3x=13,3x÷3=13÷3,x=;(86)=,3(6x﹣1)=64,18x﹣3=64,18x﹣3+3=64+3,18x=67,18x÷18=67÷18,x=(87)8(2X﹣7)=5(X+13),16x﹣56=5x+65,16x﹣56﹣5x=5x+65﹣5x,11x﹣56=65,11x﹣56+56=65+56,11x=121,11x÷11=121÷11,x=11,(88)3(x+4.5)=60,3(x+4.5)÷3=60÷3,x+4.5=20,x+4.5﹣4.5=20﹣4.5,x=15.5(89)1.6x+2.4=7.52,1.6x+2.4﹣2.4=7.52﹣2.4,1.6x=5.12,1.6x÷1.6=5.12÷1.6,x=3.2;(90)3(x﹣0.8)=6.3,3x﹣2.4=6.3,3x﹣2.4+2.4=6.3+2.4,3x=8.7,3x÷3=8.7÷3,x=2.9;(91)28.4﹣5x=5.8,28.4﹣5x+5x=5.8+5x,5.8+5x=28.4,5.8+5x﹣5.8=28.4﹣5.8,5x=22.6,5x÷5=22.6÷5,x=4.52 (92)x:=25x=×3,25x=,25x÷25=,x=;(93)+2x=,+2x=,2x=0,x=0;(94)x=15%,x×x=15%x,0.15x=0.15,0.15x÷0.15=0.15÷0.15,x=1;(95)x﹣x=,x=,x=,x=.(96)x+50%x=6,1.5x=6,1.5x÷1.5=6÷1.5,x=4;(97):x=0.3:12,0.3x=,0.3x÷0.3=9÷0.3,x=30;(98)4x+2(8﹣x)=26,4x+16﹣2x=26,2x+16=26,2x+16﹣16=26﹣16,2x÷2=10÷2,x=5(99)x﹣=0,x﹣+=0+,x=,x×3=×3,x=;(100)+x=1,+x﹣=1﹣,x=,x×=×,x=1;(101)x×(+)=,x=,x×=×,x=.(102),,,3x÷3=,x=;(103),,,x=20;(104)x﹣,,,x=;(105)x×,x×,x=(106)5x+35=650,5x+35﹣35=650﹣35,5x=615,5x÷5=615÷5,x=123;(107)720÷3x=80,720÷3x×3x=80×3x,240x=720,240x÷240=720÷240,x=3;(108)3.6x﹣0.9x=8.1,(3.6﹣0.9)x=8.1,2.7x=8.1,2.7x÷2.7=8.1÷2.7,x=3;(109)4×4.5﹣3x=6,18﹣3x=6,18﹣3x+3x=6+3x,6+3x=18,6+3x﹣6=18﹣6,3x=12,3x÷3=12÷3,x=4(110)=,2.5x=10×0.8,2.5x÷2.5=8÷2.5,x=3.2;(111)6×3﹣1.8X=7.2,18﹣1.8X=7.2,18﹣1.8X+1.8X=7.2+1.8X,7.2+1.8X=18,7.2+1.8X﹣7.2=18﹣7.2,1.8X=10.8,1.8X÷1.8=10.8÷1.8,X=6(112)÷x=,x=÷,x=;(113)x÷=42,x=42×,x=9;(114)x+=,x+﹣=﹣,x=,x÷=÷,x=(115)7x÷3=8.19,7x÷3×3=8.19×3,7x=24.57,7x÷7=24.57÷7,x=3.51;(116)12:0.6=x:,0.6x=12×,0.6x=6,0.6x÷0.6=6÷0.6,x=10;(117)3(x+2)=4(x+1),3x+6=4x+4,3x+6﹣3x=4x+4﹣3x,x+4=6,x+4﹣4=6﹣4,x=2 (118)3x﹣70%x=9.2,3x﹣0.7x=9.2,2.3x=9.2,2.3x÷2.3=9.2÷2.3,x=4;(119)6+x=240,6+x﹣6=240﹣6,x=234,x÷=234÷,x=390(120)22.5﹣0.4x=12.5,22.5﹣0.4x+0.4x=12.5+0.4x,12.5+0.4x=22.5,12.5+0.4x﹣12.5=22.5﹣12.5,0.4x÷0.4=10÷0.4,x=25;(121)x:3.5=4:2,2x=3.5×4,2x÷2=14÷2,x=6(122)x﹣0.8x﹣6=16,0.2x﹣6=16,0.2x﹣6+6=16+6,0.2x÷0.2=22÷0.2,x=110;(123):=x:8,x=8×,x×=8××,x=4;(124),0.06x=2×0.015,0.06x÷0.06=0.03÷0.06,x=0.5;(125)x:15=:,x=15×,x×6=15××6,x=40;(126)x+x=,x=,x×=×,x=;(127)x×50%﹣x=5,x=5,x×6=5×6,x=30;(128)1﹣x=,1﹣x+x=+x,+x=1,+x﹣=1﹣,x×=×,x=;(129)2.5+1x=3,2.5+1x﹣2.5=3﹣2.5,x=,x×=×,x=(130)3x﹣2=4,3x﹣2+2=4+2,3x=6,3x÷3=6÷3,x=;(131)8.5﹣3x=2,8.5﹣3x+3x=2+3x,3x+2=8.5,3x+2﹣2=8.5﹣2,3x=6,3x÷3=6÷3,x=2;(132)3÷x=4,3÷x×x=4×x,4x=3,4x÷4=3÷4,x=(133)x﹣5%=17.54,解:x﹣5%+5%=17.54+5%,x=17.59,x=23;(134):=:(4﹣x),解:4x=,2﹣x+x=x,2﹣+x,=x,x=3(135)6x+31=49,6x+31﹣31=49﹣31,6x=18,6x÷6=18÷6,x=3;(136)7x÷3=8.19,7x÷3×3=8.19×3,7x=24.57,7x÷7=24.57÷7,x=3.51;(137)32.8﹣9x=17.5,32.8﹣9x+9x=17.5+9x,17.5+9x=32.8,17.5+9x﹣17.5=32.8﹣17.5,9x=15.3,9x÷9=15.3÷9,x=1.7;(138)x﹣0.36x=16,(1﹣0.36)x=16,0.64x=16,0.64x÷0.64=16÷0.64,x=25;(139)6×7+3x=69,42+3x=69,42+3x﹣42=69﹣42,3x=27,3x÷3=27÷3,x=9;(140)6x+2x﹣56=0,(6+2)x﹣56+56=0+56,8x=56,8x÷8=56÷8,x=7(141)3x﹣0.45×4=2.7,3x﹣1.8=2.7,3x﹣1.8+1.8=2.7+1.8,3x=4.5,3x÷3=4.5÷3,x=1.5;(142)5.8x﹣4.6x=0.96,1.2x=0.96,1.2x÷1.2=0.96÷1.2,x=0.8;(143)8.4÷(9﹣x)=3,9﹣x=8.4÷3,9﹣x=2.8,x=9﹣2.8,x=6.2;(144)3x÷1.2=8,3x÷1.2×1.2=8×1.2,3x=9.6,3x÷3=9.6÷3,x=3.2(145)5x+28=71,5x+28﹣28=71﹣28,5x=43,5x÷5=43÷5,x=8.6;(146)8.7﹣1.2x=3.9,8.7﹣1.2x+1.2x﹣3.9=3.9+1.2x﹣3.9,4.8=1.2x,1.2x=4.8,1.2x÷1.2=4.8÷1.2,x=4;(147)8x﹣2.6x=37.8,5.4x=37.8,5.4x÷5.4=37.8÷5.4,x=7;(148)0.75x﹣0.95×4=8.5,0.75x﹣3.8=8.5,0.75x﹣3.8+3.8=8.5+3.8,0.75x=12.3,0.75x÷0.75=12.3÷0.75,x=16.4,;(149)54÷2+3x=72,27+3x=72,27+3x﹣27=72﹣27,3x=45,3x÷3=45÷3,x=15;(150)8x﹣2.6=37.8,8x﹣2.6+2.6=37.8+2.6,8x=40.4,8x÷8=40.4÷8,x=5.05(151)x÷=,x÷×=×,x=,x×4=×4,x=;(152)x+30%x=26,(1+30%)x=26,1.3x=26,1.3x÷1.3=26÷1.3,x=20;(153)7.8﹣3x=3.6,7.8﹣3x+3x=3.6+3x,3.6+3x=7.8,3.6+3x﹣3.6=7.8﹣3.6,3x=4.2,3x÷3=4.2÷3,x=1.4(154)6×3﹣1.8x=7.2,18﹣1.8x=7.2,18﹣1.8x+1.8x=7.2+1.8x,18=7.2+1.8x,18﹣7.2=7.2+1.8x﹣7.2,10.8=1.8x,10.8÷1.8=1.8x÷1.8,x=6;(155)10:x=4.5:0.8,4.5x=10×0.8,4.5x=8,4.5x÷4.5=8÷4.5,x=;(156):=x:,x=×,x=,x÷=÷,x=(157)X﹣7.65=4.64,X﹣7.65+8.67=4.64+7.65,X=12.29;(158)28.25﹣X=8.25,28.25﹣X+X=8.25+X,X+8.25=28.25,X+8.25﹣8.25=28.25﹣8.25,X=20;(159)X﹣(3.6+2.97)=12.42,X﹣6.57=12.42,X﹣6.57+6.57=12.42+6.57,X=18.99(160)÷x=,÷x×x=×x,x=,x÷=÷,x=×,x=;(161)14.5=5.5,14.5+14.5=5.5+14.5,=20,×8=20×8,x=160(162)x﹣80%x=48,(1﹣0.8)x=48,0.2x=48,0.2x÷0.2=48÷0.2,x=240;(163)75%x﹣5×=6,0.75x﹣3=6,0.75x﹣3+3=6+3,0.75x=9,0.75x÷0.75=9÷0.75,x=12(164)x﹣6.8=15.4,x﹣6.8+6.8=15.4+6.8,x=22.2;(165)1.9x=5.7,1.9x÷1.9=5.7÷1.9,x=3;(166)4.3y﹣y=4.6,3.3y=4.6,3.3y÷3.3=4.6÷3.3,y=;(167)5x+2.6=7.6,5x+2.6﹣2.6=7.6﹣2.6,5x=5,5x÷5=5÷5,x=1(168)x﹣1.5=12.9,x﹣1.5+1.5=12.9﹣1.5,x=11.4;(169)9x+5x=8.4,14x=8.4,14x÷14=8.4÷14,x=0.6;(170)6.8+3.2x=14.8,6.8﹣6.8+3.2x=14.8﹣6.8,3.2x=8,3.2x÷3.2=8÷3.2,x=2.5(171)5÷x=,5÷x×x=x,5=x,5÷=x÷,x=;(172)﹣x=,﹣x+x=+x,=+x,﹣=+x﹣,=x,÷==x÷,x=1;(173)4.5×﹣3x=1.5,1.5﹣3.5x=1.5,1.5﹣3.5x+3.5x=1.5+3.5x,1.5=1.5+3.5x,1.5﹣1.5=1.5+3.5x﹣1.5,0=3.5x,0÷3.5=3.5x÷3.5,x=0(174)(1+25%)x=0.5,1.25x=0.5,1.25x÷1.25=0.5÷1.25,x=0.4;(175)x﹣40%x=9,0.6x=9,0.6x÷0.6=9÷0.6,x=15;(176)x×20%=15.2,x×20%÷20%=15.2÷20%,x=76(177)30x﹣30=180,30x﹣30+30=180+30,30x=210,30x÷30=210÷30,x=7;(178)x﹣x=,x=,x÷=÷,x=;(179)x÷75%=3,x÷75%×75%=3×75%,x=,x÷=÷,x=(180)4x﹣,4x﹣6=2.4,4x=2.4+6,x=8.4÷4,x=2.1.(181):x=:4.5,x=4.5×,x=2,x=2×,x=5(182)(x﹣4.5)×6=12.5,6x﹣4.5×6=12.5,6x﹣27=12.5,6x﹣27+27=12.5+27,6x=39.5,6x÷6=39.5÷6,x=6;(183)27﹣17x=13.4,27﹣17x+17x=13.4+17x,13.4+17x=27,13.4+17x﹣13.4=27﹣13.4,17x=13.6,17x÷17=13.6÷17,x=0.8;(184)9.6+3x=3.24×5,9.6+3x﹣9.6=16.2﹣9.6,3x=6.6,3x÷3=6.6÷3,x=2.2(185)2x+5=5x﹣7,2x+5﹣2x=5x﹣7﹣2x,3x﹣7=5,3x﹣7+7=5+7,3x=12,3x÷3=12÷3,x=4;(186)3(x﹣2)=2﹣5(x﹣2),3x﹣6=12﹣5x,3x﹣6+5x=12﹣5x+5x,8x﹣6=12,8x﹣6+6=12+6,8x=18,8x÷8=18÷8,x=2.25;(187)4x﹣3(20﹣x)+4=0,7x﹣56=0,7x﹣56+56=0+56,7x=56,7x÷7=56÷7,x=8;(188)﹣=1,(﹣)×24=1×24,6(y+2)﹣4(2y﹣3)=24,30﹣2y=24,30﹣2y+2y=24+2y,2y+24=30,2y+24﹣24=30﹣24,2y=6,2y÷2=6÷2,y=3(189)4x﹣5×6=12,4x﹣30=12,4x﹣30+30=12+30,4x=42,4x÷4=42÷4,x=10.5;(190)8x﹣3x=15.6,5x=15.6,5x÷5=15.6÷5,x=3.12;(191)30×(x÷4)=60,30×(x÷4)÷30=60÷30,x÷4=2,x÷4×4=2×4,x=8;(192)7.2×0.5﹣3x=1.2,3.6﹣3x=1.2,3.6﹣3x+3x=1.2+3x,3x+1.2=3.6,3x+1.2﹣1.2=3.6﹣1.2,3x=2.4,3x÷3=2.4÷3,x=0.8 (193)5x﹣2.4×5=8,5x﹣12+12=8+12,5x=20,5x÷5=20÷5,x=4,(194)+x=×2,x=,x×=×,x=.(195)5x+2.4×15=66,5x+36=66,5x+36-36=66-36,5x=30,5x÷5=30÷5,x=6;(196)3.2x+2.8x-x=1,5x=1,5x÷5=1÷5,x=0.2;(197)2.5×16-8x=12,40-8x=12,40-8x+8x=12+8x,8x+12=40,8x+12-12=40-12,8x=28,8x÷8=28÷8,x=3.5.(198)9.6-3x=6.3,9.6-3x+3x=6.3+3x,6.3+3x=9.6,6.3+3x-6.3=9.6-6.3,3x=3.3,3x÷3=3.3÷3,x=1.1;(199)5(x+6)=75,5x+30=75,5x+30-30=75-30,5x=45,5x÷5=45÷5,x=9;(200)x÷0.7+0.9×3=4,x÷0.7+2.7=4,x÷0.7+2.7-2.7=4-2.7,x÷0.7=1.3,x÷0.7×0.7=1.3×0.7,x=0.91.
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