90=6+x+2x

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Solution for 90=6+x+2x equation: 



90=6+x+2x

We move all terms to the left:

90-(6+x+2x)=0

We add all the numbers together, and all the variables

-(3x+6)+90=0

We get rid of parentheses

-3x-6+90=0

We add all the numbers together, and all the variables

-3x+84=0

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

-3x=-84

x=-84/-3

x=+28

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