90=6(a+7)

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Solution for 90=6(a+7) equation: 



90=6(a+7)

We move all terms to the left:

90-(6(a+7))=0



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

6(a+7)

We multiply parentheses

6a+42

Back to the equation:

-(6a+42)



We get rid of parentheses

-6a-42+90=0

We add all the numbers together, and all the variables

-6a+48=0

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

-6a=-48

a=-48/-6

a=+8

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