7a-12=16

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Solution for 7a-12=16 equation: 



7a-12=16

We move all terms to the left:

7a-12-(16)=0

We add all the numbers together, and all the variables

7a-28=0

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

7a=28

a=28/7

a=4

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