-2(a-3)=12

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



-2(a-3)=12

We move all terms to the left:

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

We multiply parentheses

-2a+6-12=0

We add all the numbers together, and all the variables

-2a-6=0

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

-2a=6

a=6/-2

a=-3

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