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28%x%0.21x=147 解方程

题目可以改写成: (78-48)%,乘以x,等于24, x 30%=24, x=2400除以30,

①220%x=0.2 2.2x=0.2 x=0.2÷2.2 x=1/11 ②x-25%x=5/8 7

42%x-12%x=36解方程 解 (42%-12%)x=36 30%x=36 x=

解由 x-28%x=32.24 得 x-0.28x=32.24 即0.72x=32.24 即x

29%x+71%x=2/3 解: 100%x=2/3

41%x=85 x=8500/41

(1)1.7x+130%x=6 3x=6 3x

①75%X=120,0.75X=120,0.75X÷0.75=120÷0.75, X=160;②X+

0.68x=1.7 x=1.7/0.68 x=2.5

29%x+71%x=2/3 解:100%x=2/3 x=2/3

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