A(n)=2n-3

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Solution for A(n)=2n-3 equation: 



(A)=2A-3

We move all terms to the left:

(A)-(2A-3)=0

We get rid of parentheses

A-2A+3=0

We add all the numbers together, and all the variables

-1A+3=0

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

-A=-3

A=-3/-1

A=+3

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