12(-2a+2)=-9(1+3a)

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Solution for 12(-2a+2)=-9(1+3a) equation: 



12(-2a+2)=-9(1+3a)

We move all terms to the left:

12(-2a+2)-(-9(1+3a))=0

We add all the numbers together, and all the variables

12(-2a+2)-(-9(3a+1))=0

We multiply parentheses

-24a-(-9(3a+1))+24=0



We calculate terms in parentheses: -(-9(3a+1)), so:

-9(3a+1)

We multiply parentheses

-27a-9

Back to the equation:

-(-27a-9)



We get rid of parentheses

-24a+27a+9+24=0

We add all the numbers together, and all the variables

3a+33=0

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

3a=-33

a=-33/3

a=-11

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