Solve the System by the Addition Method $$\left\{ \begin{array} { r } 3 x + y = 10 \\12 x + 4 y = 40\end{array} \right.$$

question 45

Multiple Choice

Solve the system by the addition method.
- $$\left\{ \begin{array} { r } 3 x + y = 10 \\12 x + 4 y = 40\end{array} \right.$$

• A) \(\{ ( 0,10 ) \}\)
• B) \(\varnothing\)
• C) \(\{ ( 5 , - 5 ) \}\)
• D) \(\{ ( x , y ) \mid 3 x + y = 10 \}\)

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