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

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



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

We move all terms to the left:

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



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

x-12+2(x-12)

determiningTheFunctionDomain
x+2(x-12)-12

We multiply parentheses

x+2x-24-12

We add all the numbers together, and all the variables

3x-36

Back to the equation:

-(3x-36)



We get rid of parentheses

-3x+36+90=0

We add all the numbers together, and all the variables

-3x+126=0

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

-3x=-126

x=-126/-3

x=+42

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