31.80=0.12*x+x

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Solution for 31.80=0.12*x+x equation: 



31.80=0.12*x+x

We move all terms to the left:

31.80-(0.12*x+x)=0

We add all the numbers together, and all the variables

-(+1.12x)+31.80=0

We add all the numbers together, and all the variables

-(+1.12x)+31.8=0

We get rid of parentheses

-1.12x+31.8=0

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

-1.12x=-31.8

x=-31.8/-1.12

x=28+0.44/1.12

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