a=2a-30

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Solution for a=2a-30 equation: 



a=2a-30

We move all terms to the left:

a-(2a-30)=0

We get rid of parentheses

a-2a+30=0

We add all the numbers together, and all the variables

-1a+30=0

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

-a=-30

a=-30/-1

a=+30

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