Answer
$y=16$
Work Step by Step
The given equation is
$\Rightarrow \sqrt{y}=4$
Square each side of the equation.
$\Rightarrow (\sqrt{y})^2=4^2$
Simplify.
$\Rightarrow y=16$
Check $y=16$.
$\Rightarrow \sqrt{y}=4$
$\Rightarrow \sqrt{16}=4$
$\Rightarrow 4=4$
True.
Hence, the solution is $y=16$.
