84=-5a-6(a-3)

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Solution for 84=-5a-6(a-3) equation: 



84=-5a-6(a-3)

We move all terms to the left:

84-(-5a-6(a-3))=0



We calculate terms in parentheses: -(-5a-6(a-3)), so:

-5a-6(a-3)

We multiply parentheses

-5a-6a+18

We add all the numbers together, and all the variables

-11a+18

Back to the equation:

-(-11a+18)



We get rid of parentheses

11a-18+84=0

We add all the numbers together, and all the variables

11a+66=0

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

11a=-66

a=-66/11

a=-6

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