-2a-6=-18

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Solution for -2a-6=-18 equation: 



-2a-6=-18

We move all terms to the left:

-2a-6-(-18)=0

We add all the numbers together, and all the variables

-2a+12=0

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

-2a=-12

a=-12/-2

a=+6

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