SOLUTION: Please help me solve this problem. A(n)=A(1)+nd-d Solving for d.

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Question 670947: Please help me solve this problem.
A(n)=A(1)+nd-d
Solving for d.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
A(n) = A(1) + nd-d
Solving for d.
:
Factor out d:
A(n) = A(1) + d(n-1)
:
subtract A(1) from both sides
A(n) - A(1) = d(n-1)
:
divide both sides by (n-1)
%28A%28n%29-A%281%29%29%2F%28%28n-1%29%29 = d
:
factor out A
%28A%28n-1%29%29%2F%28%28n-1%29%29 = d
:
Cancel (n-1)
A = d