SAT Question 0380bbdc: Nonlinear Equations In One Variable And Systems Of Equations In Two Variables answer and explanation with Desmos solution

Choice B is correct. Dividing each side of the given equation by $4$ yields $\sqrt{2x}=4$. Squaring both sides of this equation yields $2x=16$. Multiplying each side of this equation by $3$ yields $6x=48$. Therefore, the value of $6x$ is $48$.