Solve the System by the Method of Substitution $\left\{ \begin{aligned}x ^ { 2 } + y ^ { 2 } & = 625 \\7 x - 24 y & = 0\end{aligned} \right.$

Multiple Choice

Solve the system by the method of substitution. $\left\{ \begin{aligned}x ^ { 2 } + y ^ { 2 } & = 625 \\7 x - 24 y & = 0\end{aligned} \right.$

A) (24, 7) , (-24, -7)
B) (24, 7)
C) (24, 7) , (-24, 7) , (-24, -7) , (24, -7)
D) (7, 24) , (7, -24)
E) no real solution