Chapter 11, Problem 5RE

To determine

To solve: each system of the given equations using substitution or elimination.

Answer to Problem 5RE

Solution: $(2,-1)$

Explanation of Solution

  $\{\begin{array}{l}x-2y=4\\ 3x+2y=4\end{array}$

Add both equation and solve for $x$

  $\begin{array}{l}x+3x-4-4=0\\ 4x-8=0\\ 4x=8\\ x=2\end{array}$

Solve for $y$

  $\begin{array}{l}x-2y=4\\ 2-2y=4\\ 2y=-2\\ y=-1\end{array}$