-2a-20=4

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Solution for -2a-20=4 equation: 



-2a-20=4

We move all terms to the left:

-2a-20-(4)=0

We add all the numbers together, and all the variables

-2a-24=0

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

-2a=24

a=24/-2

a=-12

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