-3a-4=8+a

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



-3a-4=8+a

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-3a-a-8-4=0

We add all the numbers together, and all the variables

-4a-12=0

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

-4a=12

a=12/-4

a=-3

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