12+4a-3a-12+5a=-16-2a-7-9+2a

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Solution for 12+4a-3a-12+5a=-16-2a-7-9+2a equation: 



12+4a-3a-12+5a=-16-2a-7-9+2a

We move all terms to the left:

12+4a-3a-12+5a-(-16-2a-7-9+2a)=0

We add all the numbers together, and all the variables

4a-3a+5a+12-12-(-32)=0

We add all the numbers together, and all the variables

6a+32=0

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

6a=-32

a=-32/6

a=-5+1/3

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