-3a-19=20

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Solution for -3a-19=20 equation: 



-3a-19=20

We move all terms to the left:

-3a-19-(20)=0

We add all the numbers together, and all the variables

-3a-39=0

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

-3a=39

a=39/-3

a=-13

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