90=3x+-18=90

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Solution for 90=3x+-18=90 equation: 



90=3x+-18=90

We move all terms to the left:

90-(3x+-18)=0

We add all the numbers together, and all the variables

-(3x-18)+90=0

We get rid of parentheses

-3x+18+90=0

We add all the numbers together, and all the variables

-3x+108=0

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

-3x=-108

x=-108/-3

x=+36

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