90=(5x)+(x+12)

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Solution for 90=(5x)+(x+12) equation: 



90=(5x)+(x+12)

We move all terms to the left:

90-((5x)+(x+12))=0



We calculate terms in parentheses: -(5x+(x+12)), so:

5x+(x+12)

We get rid of parentheses

5x+x+12

We add all the numbers together, and all the variables

6x+12

Back to the equation:

-(6x+12)



We get rid of parentheses

-6x-12+90=0

We add all the numbers together, and all the variables

-6x+78=0

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

-6x=-78

x=-78/-6

x=+13

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