120=x+20x

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Solution for 120=x+20x equation: 



120=x+20x

We move all terms to the left:

120-(x+20x)=0

We add all the numbers together, and all the variables

-(+21x)+120=0

We get rid of parentheses

-21x+120=0

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

-21x=-120

x=-120/-21

x=5+5/7

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