-8-5=12-9a

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Solution for -8-5=12-9a equation: 



-8-5=12-9a

We move all terms to the left:

-8-5-(12-9a)=0

We add all the numbers together, and all the variables

-(-9a+12)-8-5=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

9a-12-13=0

We add all the numbers together, and all the variables

9a-25=0

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

9a=25

a=25/9

a=2+7/9

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