x-140-(x-140)*40%=1/5x这个方程怎么做?
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x-140-(x-140)*40%=1/5x这个方程怎么做?
![x-140-(x-140)*40%=1/5x这个方程怎么做?](/uploads/image/z/16867838-38-8.jpg?t=x-140-%28x-140%29%2A40%25%3D1%2F5x%E8%BF%99%E4%B8%AA%E6%96%B9%E7%A8%8B%E6%80%8E%E4%B9%88%E5%81%9A%3F)
x-140-(x-140)*40%=1/5x
x-140-(x-140)*2/5=1/5x
5*x-5*140-5*(x-140)*2/5=5*1/5x
5x-700-2(x-140)=x
5x-700-2x+280=x
3x-420=x
3x-x=420
2x=420
x=210
x-140-(x-140)*2/5=1/5x
5*x-5*140-5*(x-140)*2/5=5*1/5x
5x-700-2(x-140)=x
5x-700-2x+280=x
3x-420=x
3x-x=420
2x=420
x=210