### Home > A2C > Chapter 3 > Lesson 3.1.6 > Problem3-84

3-84.

Solve the system of equations at right algebraically.

$\left. \begin{array} { r } { 2 x - 3 y = 12 } \\ { y + x = - 9 } \end{array} \right.$

Try using substitution to solve this system of equations.