-7=2a+5a

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Solution for -7=2a+5a equation: 



-7=2a+5a

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(+7a)-7=0

We get rid of parentheses

-7a-7=0

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

-7a=7

a=7/-7

a=-1

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