80=-10(9a+10)

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Solution for 80=-10(9a+10) equation: 



80=-10(9a+10)

We move all terms to the left:

80-(-10(9a+10))=0



We calculate terms in parentheses: -(-10(9a+10)), so:

-10(9a+10)

We multiply parentheses

-90a-100

Back to the equation:

-(-90a-100)



We get rid of parentheses

90a+100+80=0

We add all the numbers together, and all the variables

90a+180=0

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

90a=-180

a=-180/90

a=-2

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