9+7a=12

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Solution for 9+7a=12 equation: 



9+7a=12

We move all terms to the left:

9+7a-(12)=0

We add all the numbers together, and all the variables

7a-3=0

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

7a=3

a=3/7

a=3/7

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