-72=-8(9+a)

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Solution for -72=-8(9+a) equation: 



-72=-8(9+a)

We move all terms to the left:

-72-(-8(9+a))=0

We add all the numbers together, and all the variables

-(-8(a+9))-72=0



We calculate terms in parentheses: -(-8(a+9)), so:

-8(a+9)

We multiply parentheses

-8a-72

Back to the equation:

-(-8a-72)



We get rid of parentheses

8a+72-72=0

We add all the numbers together, and all the variables

8a=0

a=0/8

a=0

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