3a+39=4a-20

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Solution for 3a+39=4a-20 equation: 



3a+39=4a-20

We move all terms to the left:

3a+39-(4a-20)=0

We get rid of parentheses

3a-4a+20+39=0

We add all the numbers together, and all the variables

-1a+59=0

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

-a=-59

a=-59/-1

a=+59

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