12=a-16

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Solution for 12=a-16 equation: 



12=a-16

We move all terms to the left:

12-(a-16)=0

We get rid of parentheses

-a+16+12=0

We add all the numbers together, and all the variables

-1a+28=0

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

-a=-28

a=-28/-1

a=+28

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