a-4=3a+8

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Solution for a-4=3a+8 equation: 



a-4=3a+8

We move all terms to the left:

a-4-(3a+8)=0

We get rid of parentheses

a-3a-8-4=0

We add all the numbers together, and all the variables

-2a-12=0

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

-2a=12

a=12/-2

a=-6

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