3a+12=a-2

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



3a+12=a-2

We move all terms to the left:

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

We get rid of parentheses

3a-a+2+12=0

We add all the numbers together, and all the variables

2a+14=0

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

2a=-14

a=-14/2

a=-7

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