90=x+(2x-12)

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Solution for 90=x+(2x-12) equation: 



90=x+(2x-12)

We move all terms to the left:

90-(x+(2x-12))=0



We calculate terms in parentheses: -(x+(2x-12)), so:

x+(2x-12)

We get rid of parentheses

x+2x-12

We add all the numbers together, and all the variables

3x-12

Back to the equation:

-(3x-12)



We get rid of parentheses

-3x+12+90=0

We add all the numbers together, and all the variables

-3x+102=0

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

-3x=-102

x=-102/-3

x=+34

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