4-a=-80

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Solution for 4-a=-80 equation: 



4-a=-80

We move all terms to the left:

4-a-(-80)=0

We add all the numbers together, and all the variables

-1a+84=0

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

-a=-84

a=-84/-1

a=+84

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