-72=-9(a-2)

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Solution for -72=-9(a-2) equation: 



-72=-9(a-2)

We move all terms to the left:

-72-(-9(a-2))=0



We calculate terms in parentheses: -(-9(a-2)), so:

-9(a-2)

We multiply parentheses

-9a+18

Back to the equation:

-(-9a+18)



We get rid of parentheses

9a-18-72=0

We add all the numbers together, and all the variables

9a-90=0

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

9a=90

a=90/9

a=10

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