Use the Substitution Method to Solve the System $$\begin{array} { l } 9 x + y = 7 \\- 9 x + 5 y = - 1\end{array}$$

question 86

Multiple Choice

Use the substitution method to solve the system.
- $$\begin{array} { l } 9 x + y = 7 \\- 9 x + 5 y = - 1\end{array}$$

• A) \(\left( \frac { 5 } { 3 } , - 8 \right)\)
• B) \(( 1 , - 5 )\)
• C) \(\left[ \frac { 2 } { 3 } , 1 \right]\)
• D) \(\left( 5 , \frac { 4 } { 5 } \right)\)

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