-7a+9a-12=-22

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Solution for -7a+9a-12=-22 equation: 



-7a+9a-12=-22

We move all terms to the left:

-7a+9a-12-(-22)=0

We add all the numbers together, and all the variables

2a+10=0

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

2a=-10

a=-10/2

a=-5

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