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x%1/5%3/4(x%1/5)=0.2怎么解

x=1 x=100 x=10/7 x =125

(87.5%x-2/5)÷1/4=1/2/3 7/8x-2/5=3/8 7/8x=31/40 x=31/35

解: 3/8X﹣37.5%X=1/8 3/8X﹣3/8X=1/8 (无解)37.5%=0.375=3/8 解: 20%X+1.2=4 0.2x+1.2=4 0.2x=2.8 x=14 解:75%﹣1/4X=12.5 0.75﹣1/4X=12.5 ﹣1/4X=12.5- 0.75 ﹣1/4X=11.75 X=-47

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