90=(9x+6)+3x

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Solution for 90=(9x+6)+3x equation: 



90=(9x+6)+3x

We move all terms to the left:

90-((9x+6)+3x)=0



We calculate terms in parentheses: -((9x+6)+3x), so:

(9x+6)+3x

We add all the numbers together, and all the variables

3x+(9x+6)

We get rid of parentheses

3x+9x+6

We add all the numbers together, and all the variables

12x+6

Back to the equation:

-(12x+6)



We get rid of parentheses

-12x-6+90=0

We add all the numbers together, and all the variables

-12x+84=0

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

-12x=-84

x=-84/-12

x=+7

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