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x%1/5%3/4(x%1/5)=0.2怎么解

一、0.2x=0.7-0.5 0.2x=0.2 x=1 二、0.95x=95 x=100 三、30+0.7x=40 0.7x=10 x=7分之100 四、0.32x=40 x=125

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

3 4 x-5%x=17.5 0.7x=17.5, 0.7x÷0.7=17.5÷0.7, x=25;(2) x: 1 4 =4: 4 3 , 4 3 x= 1 4 ×4 , 4 3 x=1, 4 3 x 3 4 =1× 3 4 , x= 3 4 .

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