Solve the system by the substitution method.
-$$\left\{ \begin{array} { l }
3 x + y = 11 \
9 x + 3 y = 33
\end{array} \right.$$
A) $\{ ( 0,11 ) \}$
B) $\{ ( x , y ) \mid 3 x + y = 11 \}$
C) $\varnothing$
D) $\{ ( 5 , - 4 ) \}$

Question

Solve the system by the substitution method.
-$$\left\{ \begin{array} { l } 
3 x + y = 11 \
9 x + 3 y = 33
\end{array} \right.$$
A) $\{ ( 0,11 ) \}$
B) $\{ ( x , y ) \mid 3 x + y = 11 \}$
C) $\varnothing$
D) $\{ ( 5 , - 4 ) \}$

Quizplus · Accepted Answer

The second equation is 3 times the first, indicating the system has infinitely many solutions that lie on the line described by $3x + y = 11$.

Solve the System by the Substitution Method {3x+y=119x+3y=33\left\{ \begin{array} { l } 3 x + y = 11 \\9 x + 3 y = 33\end{array} \right.{3x+y=119x+3y=33​

Solve the System by the Substitution Method $\left\{ \begin{array} { l } 3 x + y = 11 \\9 x + 3 y = 33\end{array} \right.$