120=x-0.2x

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Solution for 120=x-0.2x equation: 



120=x-0.2x

We move all terms to the left:

120-(x-0.2x)=0

We add all the numbers together, and all the variables

-(+0.8x)+120=0

We get rid of parentheses

-0.8x+120=0

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

-0.8x=-120

x=-120/-0.8

x=+150

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