20=60a-900

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Solution for 20=60a-900 equation: 



20=60a-900

We move all terms to the left:

20-(60a-900)=0

We get rid of parentheses

-60a+900+20=0

We add all the numbers together, and all the variables

-60a+920=0

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

-60a=-920

a=-920/-60

a=15+1/3

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