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+9=0

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

3a=-9

a=-9/3

a=-3

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