A=30-3n

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Solution for A=30-3n equation: 



=30-3A

We move all terms to the left:

-(30-3A)=0

We add all the numbers together, and all the variables

-(-3A+30)=0

We get rid of parentheses

3A-30=0

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

3A=30

A=30/3

A=10

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