A(n)=7+(n-1)(-5)

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Solution for A(n)=7+(n-1)(-5) equation: 



(A)=7+(A-1)(-5)

We move all terms to the left:

(A)-(7+(A-1)(-5))=0

We multiply parentheses ..

A-(7+(-5A+5))=0



We calculate terms in parentheses: -(7+(-5A+5)), so:

7+(-5A+5)

determiningTheFunctionDomain
(-5A+5)+7

We get rid of parentheses

-5A+5+7

We add all the numbers together, and all the variables

-5A+12

Back to the equation:

-(-5A+12)



We get rid of parentheses

A+5A-12=0

We add all the numbers together, and all the variables

6A-12=0

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

6A=12

A=12/6

A=2

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