Solve the System of Nonlinear Equations by the Addition Method $$\begin{array} { l } 7 y = - x + 7 \\x ^ { 2 } + 49 y ^ { 2 } = 49\end{array}$$

Multiple Choice

Solve the system of nonlinear equations by the addition method. $$\begin{array} { l } 7 y = - x + 7 \\x ^ { 2 } + 49 y ^ { 2 } = 49\end{array}$$

A) { }
B) $\{ ( 7,0 ) ( 0 , - 1 ) \}$
C) $\{ ( - 7,0 ) ( 0 , - 1 ) \}$
D) $\{ ( 7,0 ) ( 0,1 ) \}$