-20=a-39

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Solution for -20=a-39 equation: 



-20=a-39

We move all terms to the left:

-20-(a-39)=0

We get rid of parentheses

-a+39-20=0

We add all the numbers together, and all the variables

-1a+19=0

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

-a=-19

a=-19/-1

a=+19

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