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

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Solution for 90=6x+6(2x-6) equation: 



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

We move all terms to the left:

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



We calculate terms in parentheses: -(6x+6(2x-6)), so:

6x+6(2x-6)

We multiply parentheses

6x+12x-36

We add all the numbers together, and all the variables

18x-36

Back to the equation:

-(18x-36)



We get rid of parentheses

-18x+36+90=0

We add all the numbers together, and all the variables

-18x+126=0

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

-18x=-126

x=-126/-18

x=+7

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