begin{arrayly=2x+33x+y=18endarray.

Frequently Asked Questions

• Solve using the substitution method of $\{\begin{array}{l}y=2x+3\\ 3x+y=18\end{array}$

  

  $$\left(x,y\right)=\left(3,9\right)$$

• Solve using the elimination method of $\{\begin{array}{l}y=2x+3\\ 3x+y=18\end{array}$

  

  $$\left(x,y\right)=\left(3,9\right)$$

• Solve using the Gauss-Jordan method of $\{\begin{array}{l}y=2x+3\\ 3x+y=18\end{array}$

  

  $$\left(x,y\right)=\left(3,9\right)$$

• Solve using the Cramer's rule of $\{\begin{array}{l}y=2x+3\\ 3x+y=18\end{array}$

  

  $$\left(x,y\right)=\left(3,9\right)$$

• Determine whether lines are parallel, perpendicular, or neither of $\{\begin{array}{l}y=2x+3\\ 3x+y=18\end{array}$

  

  $$\text{Neither parallel nor perpendicular}$$