-4a-5a+12=-3a-8a

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Solution for -4a-5a+12=-3a-8a equation: 



-4a-5a+12=-3a-8a

We move all terms to the left:

-4a-5a+12-(-3a-8a)=0

We add all the numbers together, and all the variables

-4a-5a-(-11a)+12=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

-9a+11a+12=0

We add all the numbers together, and all the variables

2a+12=0

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

2a=-12

a=-12/2

a=-6

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