Answer
It doesn't make sense
Work Step by Step
The statement doesn't make sense because we solve the two equations using different methods.
For $2^x=15,$ since it cannot be written as a power of the same base, we use logarithm to solve for the exponential equation:
$\log 2^x=\log 15$
$x\log 2=\log 15$
$x=\frac{\log 15}{\log 2}$
$x\approx 3.91$
For $2^x=16$, since it can be written as a power of the base, we solve by expressing exponential equations by expressing each side as a power of the same base.
$2^x=2^4$
$x=4$
