Solve the System of Equations Using Substitution $$\left\{ \begin{array} { r } x y = 20 \\x + y = 9\end{array} \right.$$

question 178

Multiple Choice

Solve the system of equations using substitution.
- $$\left\{ \begin{array} { r } x y = 20 \\x + y = 9\end{array} \right.$$

• A) x = 6, y = 3; x = 3, y = 6
• B) x = 10, y = 2; x = 2, y =10
• C) x = 5, y = 4; x = 4, y = 5
• D) x = 20, y = 1; x = 1, y = 20

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