31=x-0.2*x

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Solution for 31=x-0.2*x equation: 



31=x-0.2x

We move all terms to the left:

31-(x-0.2x)=0

We add all the numbers together, and all the variables

-(+0.8x)+31=0

We get rid of parentheses

-0.8x+31=0

We move all terms containing x to the left, all other terms to the right

-0.8x=-31

x=-31/-0.8

x=38+0.6/0.8

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