Which method should be used to solve the system? Explain your answer, including a description of the first step.
-$$\begin{aligned}
x ^ { 2 } - 3 y ^ { 2 } & = 49 \
7 x ^ { 2 } - 7 y ^ { 2 } & = 9
\end{aligned}$$

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The Answer of Which method should be used to solve the system? Explain your answer, including a description of the first step.
-$$\begin{aligned}
x ^ { 2 } - 3 y ^ { 2 } & = 49 \
7 x ^ { 2 } - 7 y ^ { 2 } & = 9
\end{aligned}$$

Which Method Should Be Used to Solve the System? Explain x2−3y2=497x2−7y2=9\begin{aligned}x ^ { 2 } - 3 y ^ { 2 } & = 49 \\7 x ^ { 2 } - 7 y ^ { 2 } & = 9\end{aligned}x2−3y27x2−7y2​=49=9​

Which Method Should Be Used to Solve the System? Explain $\begin{aligned}x ^ { 2 } - 3 y ^ { 2 } & = 49 \\7 x ^ { 2 } - 7 y ^ { 2 } & = 9\end{aligned}$