12=4a+7-3

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Solution for 12=4a+7-3 equation: 



12=4a+7-3

We move all terms to the left:

12-(4a+7-3)=0

We add all the numbers together, and all the variables

-(4a+4)+12=0

We get rid of parentheses

-4a-4+12=0

We add all the numbers together, and all the variables

-4a+8=0

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

-4a=-8

a=-8/-4

a=+2

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