A(n)=3n-7

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Solution for A(n)=3n-7 equation: 



(A)=3A-7

We move all terms to the left:

(A)-(3A-7)=0

We get rid of parentheses

A-3A+7=0

We add all the numbers together, and all the variables

-2A+7=0

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

-2A=-7

A=-7/-2

A=3+1/2

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