4a-20=8a-80

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Solution for 4a-20=8a-80 equation: 



4a-20=8a-80

We move all terms to the left:

4a-20-(8a-80)=0

We get rid of parentheses

4a-8a+80-20=0

We add all the numbers together, and all the variables

-4a+60=0

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

-4a=-60

a=-60/-4

a=+15

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