12a-12-4a=-57

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Solution for 12a-12-4a=-57 equation: 



12a-12-4a=-57

We move all terms to the left:

12a-12-4a-(-57)=0

We add all the numbers together, and all the variables

8a+45=0

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

8a=-45

a=-45/8

a=-5+5/8

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