Solve the System of Equations by the Substitution Method$\left\{ \begin{array} { l }
2 x + y = 7 \
6 x + 3 y = 21
\end{array} \right.$

Question

Solve the System of Equations by the Substitution Method$\left\{ \begin{array} { l } 
2 x + y = 7 \
6 x + 3 y = 21
\end{array} \right.$

Examlex · Accepted Answer

The Answer of Solve the System of Equations by the Substitution Method$\left\{ \begin{array} { l } 
2 x + y = 7 \
6 x + 3 y = 21
\end{array} \right.$

Solve the System of Equations by the Substitution Method $\left\{ \begin{array} { l } 2 x + y = 7 \\6 x + 3 y = 21\end{array} \right.$