\( \begin{array}{l}x+y=3 \\ x-y=7\end{array} \)
Answer
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Answer
\( y = \frac{(3-7)}{2} \)
Steps
Step 1 ：\( x = \frac{(3+7)}{2} \)
Step 2 ：\( y = \frac{(3-7)}{2} \)
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