9a+13=11a+7

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Solution for 9a+13=11a+7 equation: 



9a+13=11a+7

We move all terms to the left:

9a+13-(11a+7)=0

We get rid of parentheses

9a-11a-7+13=0

We add all the numbers together, and all the variables

-2a+6=0

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

-2a=-6

a=-6/-2

a=+3

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