-3+3(-2a+7)=-3a+12

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Solution for -3+3(-2a+7)=-3a+12 equation: 



-3+3(-2a+7)=-3a+12

We move all terms to the left:

-3+3(-2a+7)-(-3a+12)=0

We multiply parentheses

-6a-(-3a+12)+21-3=0

We get rid of parentheses

-6a+3a-12+21-3=0

We add all the numbers together, and all the variables

-3a+6=0

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

-3a=-6

a=-6/-3

a=+2

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