27=-3(6+a)

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Solution for 27=-3(6+a) equation: 



27=-3(6+a)

We move all terms to the left:

27-(-3(6+a))=0

We add all the numbers together, and all the variables

-(-3(a+6))+27=0



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

-3(a+6)

We multiply parentheses

-3a-18

Back to the equation:

-(-3a-18)



We get rid of parentheses

3a+18+27=0

We add all the numbers together, and all the variables

3a+45=0

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

3a=-45

a=-45/3

a=-15

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