-20-4a=-16

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Solution for -20-4a=-16 equation: 



-20-4a=-16

We move all terms to the left:

-20-4a-(-16)=0

We add all the numbers together, and all the variables

-4a-4=0

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

-4a=4

a=4/-4

a=-1

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