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(128) 10-x=8 (129) 8x+9=17
(130) 9+6x=15
(131) x+9x=4+7 (132) 2x+9=17
(133) 8-4x=6 (134) 6x-7=28
(135) 7x-9=20
(136) x-56=1 (137) 8-7x=1
(138)x-30=12
(139) 6x-21=21
(140) 6x-3=6
(141) 9x=18
(142) 4x-18=14
(143) 5x+9=11
(144) 17-2x=11
(145) x+4+8=23 (146) 7x-12=9
(147) X-5.7=2.15 (148) 5X-2X=18
(149) 3X +0.5=5
(150) 3.5×2= 4 x
(151) 26×1.5= 2x
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(152) 0.5×16―16×0.1=4x (153) 9.26－X=0.402 (164) 18x－14x=12
(165) 3 x－42÷14=15 (154) 36.9÷X=0.3 (155) X÷0.5=2.6 (156) 93－5x＝80
(157) 180-6x＝54 (158) 9＋4x＝40
(159) 0.2x－0.4＋0.5＝3.7
(160) 9.4x－0.4x＝16.2 (161) 92－4x＝20
(162) 7x÷6=1.4
(163) 16x＋34x=1
(166) 12＋4x=56
(167) 22－14x=12
(168) X+8.3=10.7
(169) 5x ＝30
(170) x-5.6=9.4
(171) x÷0.8=90
(172) 3x－8＝16
(173) 3x+9=27
(174) 5.3+7x=7.4
(175) 3x÷5=4.8
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(176) X-0.8X=6 (177) 12x+8x=4.8
(178) 7(x-2)=49
(179) 4×8+2x=36
(180) (x-2)÷3=7
五年级解方程180题答案
（1）(0.5+x)+x=9.8÷2 0.5+2x=4.9 0.5+2x-0.5=4.9-0.5 2x=4.4 2x÷2=4.4÷2 X=2.2 （2）2(X+X+0.5)=9.8 2x+2x+1=9.8
4x+1-1=9.8-1 4x=8.8 4x÷4=8.8÷4
(181) x÷5+9=21
(182)(300-x)÷5=30
(183) 91÷x ＝1.3
(184) 41-3x=17
X=2.2
（3）25000+x=6x 25000+x-x=6x-x
5x=25000 5x÷5=25000÷5 X=5000
（4）3200=440+5X+X 6x+440=3200 6x+450-450=3200-440 6x=2760 6x÷6=2760÷6
X=460
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（5）X-0.8X=6 0.2x=6 0.2x÷0.2=6÷0.2
X=30
(6)12x-8x=4.8 4x=4.8 4x÷4=4.8÷4 X=1.2 (7) 7.5+2X=15 2x+7.5-7.5=15-7.5 2x=7.5 2x÷2=7.5÷2 X=3.75 (8) 1.2x=81.6 1.2x÷1.2=81.6÷1.2
X=68
(9) x+5.6=9.4 X+5.6-5.6=9.4-5.6
X=3.8
(10)x-0.7x=3.6 0.3x=3.6 0.3x÷0.3=3.6÷0.3
X=12
(11)91÷x＝1.3 91÷x×x=1.3×x 1.3x=91 1.3x÷1.3=91÷1.3
X=70
(12) X+8.3=10.7 X+8.3-8.3=10.7-8.3
X=2.4
(13) 15x＝3 15x÷15=3÷15 X=0.2
(14) 3x－8＝16 3x-8+8=16+8 3x=24 3x÷3=24÷3 X=8 (15) 3x+9=27 3x+9-9=27-9 3x=18
3x÷3=18÷3 3x=6 (16) 18(x-2)=270 18x-36=270 18x-36+36=270+36 18x=306 18x÷18=306÷18 X=17 (17) 12x=300-4x 12x+4x=300-4x+4x 16x=300 16x÷16=300÷16 X=18.75 (18) 7x+5.3=7.4 7x+5.3-5.3=7.4-5.3 7x=2.1 7x÷7=2.1÷7 X=0.3 (19) 3x÷5=4.8 3x÷5×5=4.8×5 3x=24 3x÷3=24÷3 X=8 (20) 30÷x+25=85 30÷x+25-25=85-25 30÷x=60 30÷x×x=60×x 30=60x 60x÷60=30÷60 X=0.5 (21) 1.4×8-2x=6 11.2-2x+2x=6+2x 11.2=6+2x 2x+6-6=11.2-6
2x=5.2 2x÷2=5.2÷2 X=2.6
(22) 6x-12.8×3=0.06 6x-38.4=0.06 6x=38.46 6x÷6=38.46÷6 X=6.41
(23) 410-3x=170 410-3x+3x=170+3x 170+3x=410
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3x+170-170=410-170 3x=240 3x÷3=240÷3 X=80 (24) 3(x+0.5)=21 3x+1.5=21 3x+1.5-1.5=21-1.5 3x=19.5 3x÷3=19.5÷3 X=6.5 (25) 0.5x+8=43 0.5x+8-8=43-8 0.5x=35 0.5x÷0.5=35÷0.5 X=70 (26) 6x-3x=18 3x=18 3x÷3=18÷3 X=6
(27) 7(6.5+x)=87.5 7x+45.5=87.5 7x+45.5-45.5=87.5-45.5 7x=42 7x÷7=42÷7 X=6
(28) 0.273÷x=0.35 x=0.273÷0.35 X=0.78
(29) 1.8x=0.972 1.8x÷1.8=0.972÷1.8 X=0.54
(30) x÷0.756=90 x÷0.756×0.756=90×0.756 X=68.04 (31) 0.1(x+6)=3.3×0.4 0.1x+0.6=1.32 0.1x+0.6-0.6=1.32-0.6 0.1x=0.72 0.1x÷0.1=0.72÷0.1 X=7.2 (32) (27.5-3.5)÷x=4 24÷x=4
x=24÷4 X=6 (33) 9x-40=5 9x-40+40=5+40 9x=45 9x÷9=45÷9 X=5 (34) x÷5+9=21 x÷5+9-9=21-9 x÷5=12 x÷5×5=12×5 X=60 (35) 48-27+5x=31 5x+21-21=31-21 5x=10 5x÷5=10÷5 X=2 (36) 10.5+x+21=56 x+31.5-31.5=56-31.5 x=24.5 (37) x+2x+18=78 3x+18-18=78-18 3x=60 3x÷3=60÷3 X=20 (38) (200-x)÷5=30 (200-x)÷5×5=30×5 200-x=150 200-x+x=150+x 150+x=200 X+150-150=200-150 X=50
(39) (x-140)÷70=4 (x-140)÷70×70=4×70 X-140=280 X-140+140=280+140 X=420 （40） 20-9x=2 9x=20-2 9x=18 9x÷9=18÷9 X=2 (41) x+19.8=25.8 X+19.8-19.8=25.8-19.8
五年级解方程练习进步题180题(有规范标准答案)
