Solve the System by the Best Method $$\left\{ \begin{array} { l } x + y = 6 \\y = 2 x\end{array} \right.$$

question 103

Multiple Choice

Solve the system by the best method. Use set notation to express the solution set.
- $$\left\{ \begin{array} { l } x + y = 6 \\y = 2 x\end{array} \right.$$

• A) \(\{ ( 2 , - 4 ) \}\)
• B) \(\{ ( - 2 , - 4 ) \}\)
• C) \(\{ ( - 2,4 ) \}\)
• D) \(\{ ( 2,4 ) \}\)

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