-9a-3a=+36

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Solution for -9a-3a=+36 equation: 



-9a-3a=+36

We move all terms to the left:

-9a-3a-(+36)=0

We add all the numbers together, and all the variables

-9a-3a-36=0

We add all the numbers together, and all the variables

-12a-36=0

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

-12a=36

a=36/-12

a=-3

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