3a+9a=-96

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Solution for 3a+9a=-96 equation: 



3a+9a=-96

We move all terms to the left:

3a+9a-(-96)=0

We add all the numbers together, and all the variables

12a+96=0

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

12a=-96

a=-96/12

a=-8

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