379=a-20

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Solution for 379=a-20 equation: 



379=a-20

We move all terms to the left:

379-(a-20)=0

We get rid of parentheses

-a+20+379=0

We add all the numbers together, and all the variables

-1a+399=0

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

-a=-399

a=-399/-1

a=+399

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