12a+7=3a-1

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Solution for 12a+7=3a-1 equation: 



12a+7=3a-1

We move all terms to the left:

12a+7-(3a-1)=0

We get rid of parentheses

12a-3a+1+7=0

We add all the numbers together, and all the variables

9a+8=0

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

9a=-8

a=-8/9

a=-8/9

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