A=3a+7

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Solution for A=3a+7 equation: 



=3A+7

We move all terms to the left:

-(3A+7)=0

We get rid of parentheses

-3A-7=0

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

-3A=7

A=7/-3

A=-2+1/3

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