SAT Question baca4a4c: Linear Equations In One Variable answer and explanation with Desmos solution

Choice B is incorrect. This equation is equivalent to $7\left(2x-3\right)=392$, not $7\left(2x-3\right)=63$.

Choice C is incorrect. Distributing $7$ on the left-hand side of the given equation yields $14x-21=63$, not $2x-21=63$.

Choice D is incorrect. Distributing $7$ on the left-hand side of the given equation yields $14x-21=63$, not $2x-21=70$.