7=-9a+8a

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



7=-9a+8a

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(-1a)+7=0

We get rid of parentheses

1a+7=0

We add all the numbers together, and all the variables

a+7=0

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

a=-7

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