-9a=8-7a

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Solution for -9a=8-7a equation: 



-9a=8-7a

We move all terms to the left:

-9a-(8-7a)=0

We add all the numbers together, and all the variables

-9a-(-7a+8)=0

We get rid of parentheses

-9a+7a-8=0

We add all the numbers together, and all the variables

-2a-8=0

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

-2a=8

a=8/-2

a=-4

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