Solve the System by the Substitution Method $$\left\{ \begin{array} { l } 5 x + 3 y = 80 \\2 x + y = 30\end{array} \right.$$

question 94

Multiple Choice

Solve the system by the substitution method.
- $$\left\{ \begin{array} { l } 5 x + 3 y = 80 \\2 x + y = 30\end{array} \right.$$

• A) \(\{ ( x , y ) \mid 2 x + y = 30 \}\)
• B) \(\{ ( 10,10 ) \}\)
• C) \(\varnothing\)
• D) \(\{ ( 0,10 ) \}\)

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