-90=-2a+8(a-6)

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Solution for -90=-2a+8(a-6) equation: 



-90=-2a+8(a-6)

We move all terms to the left:

-90-(-2a+8(a-6))=0



We calculate terms in parentheses: -(-2a+8(a-6)), so:

-2a+8(a-6)

We multiply parentheses

-2a+8a-48

We add all the numbers together, and all the variables

6a-48

Back to the equation:

-(6a-48)



We get rid of parentheses

-6a+48-90=0

We add all the numbers together, and all the variables

-6a-42=0

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

-6a=42

a=42/-6

a=-7

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