7a+9=9a-17

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Solution for 7a+9=9a-17 equation: 



7a+9=9a-17

We move all terms to the left:

7a+9-(9a-17)=0

We get rid of parentheses

7a-9a+17+9=0

We add all the numbers together, and all the variables

-2a+26=0

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

-2a=-26

a=-26/-2

a=+13

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