3-2(a+3)=12

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



3-2(a+3)=12

We move all terms to the left:

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

We add all the numbers together, and all the variables

-2(a+3)-9=0

We multiply parentheses

-2a-6-9=0

We add all the numbers together, and all the variables

-2a-15=0

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

-2a=15

a=15/-2

a=-7+1/2

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