108=-6(a-9)

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Solution for 108=-6(a-9) equation: 



108=-6(a-9)

We move all terms to the left:

108-(-6(a-9))=0



We calculate terms in parentheses: -(-6(a-9)), so:

-6(a-9)

We multiply parentheses

-6a+54

Back to the equation:

-(-6a+54)



We get rid of parentheses

6a-54+108=0

We add all the numbers together, and all the variables

6a+54=0

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

6a=-54

a=-54/6

a=-9

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