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Which Method Should Be Used to Solve the System? Explain x2+3y2=1007x2+5y2=4\begin{array} { c } x ^ { 2 } + 3 y ^ { 2 } = 100 \\- 7 x ^ { 2 } + 5 y ^ { 2 } = 4\end{array}

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Which method should be used to solve the system? Explain your answer, including a description of the first step.
- x2+3y2=1007x2+5y2=4\begin{array} { c } x ^ { 2 } + 3 y ^ { 2 } = 100 \\- 7 x ^ { 2 } + 5 y ^ { 2 } = 4\end{array}

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Either method may be used. Elimination m...

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