147=-7(3a-3)

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Solution for 147=-7(3a-3) equation: 



147=-7(3a-3)

We move all terms to the left:

147-(-7(3a-3))=0



We calculate terms in parentheses: -(-7(3a-3)), so:

-7(3a-3)

We multiply parentheses

-21a+21

Back to the equation:

-(-21a+21)



We get rid of parentheses

21a-21+147=0

We add all the numbers together, and all the variables

21a+126=0

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

21a=-126

a=-126/21

a=-6

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