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Solve the System of Equations by Using Substitution $\left\{ \begin{array} { r } x + 7 y = - 2 \\3 x + y = 34\end{array} \right.$

Question 9

Multiple Choice

Solve the system of equations by using substitution.
- $\left\{ \begin{array} { r } x + 7 y = - 2 \\3 x + y = 34\end{array} \right.$

A) x = -2, y = 3
B) x = 7, y = 12
C) x = 12, y = -2
D) x = 3, y = 7

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