SOLUTION: i need help with this problem: n-3 n-4 ---=--- n+5 n+3

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Question 138236: i need help with this problem:
n-3 n-4
---=---
n+5 n+3
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
n-3 n-4
---=---
n+5 n+3 cross multiply:
(n+5)(n-4)=(n-3)(n+3)
n^2+n-20=n^2-9
n^2-n^2+n=20-9
n=11 answer.