2a-12=-20

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Solution for 2a-12=-20 equation: 



2a-12=-20

We move all terms to the left:

2a-12-(-20)=0

We add all the numbers together, and all the variables

2a+8=0

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

2a=-8

a=-8/2

a=-4

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