90=(7x+6)+(4x+7)

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Solution for 90=(7x+6)+(4x+7) equation: 



90=(7x+6)+(4x+7)

We move all terms to the left:

90-((7x+6)+(4x+7))=0



We calculate terms in parentheses: -((7x+6)+(4x+7)), so:

(7x+6)+(4x+7)

We get rid of parentheses

7x+4x+6+7

We add all the numbers together, and all the variables

11x+13

Back to the equation:

-(11x+13)



We get rid of parentheses

-11x-13+90=0

We add all the numbers together, and all the variables

-11x+77=0

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

-11x=-77

x=-77/-11

x=+7

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