3a-12=5a+7

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Solution for 3a-12=5a+7 equation: 



3a-12=5a+7

We move all terms to the left:

3a-12-(5a+7)=0

We get rid of parentheses

3a-5a-7-12=0

We add all the numbers together, and all the variables

-2a-19=0

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

-2a=19

a=19/-2

a=-9+1/2

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