9a-13=12a+11

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Solution for 9a-13=12a+11 equation: 



9a-13=12a+11

We move all terms to the left:

9a-13-(12a+11)=0

We get rid of parentheses

9a-12a-11-13=0

We add all the numbers together, and all the variables

-3a-24=0

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

-3a=24

a=24/-3

a=-8

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