-9a+7=a-a

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



-9a+7=a-a

We move all terms to the left:

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

We add all the numbers together, and all the variables

-9a+7-0=0

We add all the numbers together, and all the variables

-9a+7=0

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

-9a=-7

a=-7/-9

a=7/9

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