a-12=2a-3+8+3a

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Solution for a-12=2a-3+8+3a equation: 



a-12=2a-3+8+3a

We move all terms to the left:

a-12-(2a-3+8+3a)=0

We add all the numbers together, and all the variables

a-(5a+5)-12=0

We get rid of parentheses

a-5a-5-12=0

We add all the numbers together, and all the variables

-4a-17=0

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

-4a=17

a=17/-4

a=-4+1/4

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