Answer
x=49
Work Step by Step
Recall, in order to cancel out a square root, we square both sides of the equation. Thus, we square both sides of the equation to obtain that 36x=1764. We divide both sides of the equation by 36 to isolate x and obtain: x=49.
We now must check our solution:
$6\sqrt{49} = 42 \\\\\ 6(7)=42 \\\\ 42=42$
This is true, so x=49.
