5^x =27 = 3^3 log3 (3^3) = log3 (5^x) 3 log 3 (3) = x log3 (5) but log 3 (3) = 1 so 3 = x log3 (5) log3 (5) = 3/x and y = log3 (5) so y = 3/x x y = 3
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