-(3a+4)=8-7a

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Solution for -(3a+4)=8-7a equation: 



-(3a+4)=8-7a

We move all terms to the left:

-(3a+4)-(8-7a)=0

We add all the numbers together, and all the variables

-(3a+4)-(-7a+8)=0

We get rid of parentheses

-3a+7a-4-8=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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