9a-7=-7a

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



9a-7=-7a

We move all terms to the left:

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

We get rid of parentheses

9a+7a-7=0

We add all the numbers together, and all the variables

16a-7=0

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

16a=7

a=7/16

a=7/16

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