Question: solution of equation

As an exercise to find the solution of this equation,

         (a^(x+2))^(1/3)  =  (a^(x-5))^(1/2)

Maple 14 and 15 provide no answer, which preceding releases found to be x = 19,

but complain about a "numeric exception: division by zero"!

     Is that progress with Maple?

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