SOLUTION: If 9^y = x, then how would 9^y-9^(y-3) be represented in terms of x?

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Question 1148167: If 9^y = x, then how would 9^y-9^(y-3) be represented in terms of x?
Answer by ikleyn(52756) About Me  (Show Source):
You can put this solution on YOUR website!
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If 9^y = x,   9^y-9^(y-3) = x - x%2F9%5E3 = x - x%2F729.