90=x+10+2x+x

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Solution for 90=x+10+2x+x equation: 



90=x+10+2x+x

We move all terms to the left:

90-(x+10+2x+x)=0

We add all the numbers together, and all the variables

-(4x+10)+90=0

We get rid of parentheses

-4x-10+90=0

We add all the numbers together, and all the variables

-4x+80=0

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

-4x=-80

x=-80/-4

x=+20

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