Find The $x$ - Coordinates(s) of the Solution(s) to the System of Equations

Multiple Choice

Find the $x$ - coordinates(s) of the solution(s) to the system of equations: $\mathrm{x}^{2}+\mathrm{y}^{2}-4 \mathrm{x}-21=0$ and $\mathrm{y}=2 \mathrm{x}-3$ .

A) 3.83 and -0.627
B) 3.83
C) -0.627 and -4.65
D) -4.25 and -4.65