-(a-7)+2a=8+4

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Solution for -(a-7)+2a=8+4 equation: 



-(a-7)+2a=8+4

We move all terms to the left:

-(a-7)+2a-(8+4)=0

We add all the numbers together, and all the variables

-(a-7)+2a-12=0

We add all the numbers together, and all the variables

2a-(a-7)-12=0

We get rid of parentheses

2a-a+7-12=0

We add all the numbers together, and all the variables

a-5=0

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

a=5

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