5a-(-2a)+7=8a

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Solution for 5a-(-2a)+7=8a equation: 



5a-(-2a)+7=8a

We move all terms to the left:

5a-(-2a)+7-(8a)=0

We add all the numbers together, and all the variables

-3a-(-2a)+7=0

We get rid of parentheses

-3a+2a+7=0

We add all the numbers together, and all the variables

-1a+7=0

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

-a=-7

a=-7/-1

a=+7

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