Answer
$$ y=0,\:x=20$$
Work Step by Step
Solving the system of equations using elimination, we find:
$$ \begin{bmatrix}2x-\frac{2}{3}y=40\\ 2x+\frac{5}{2}y=40\end{bmatrix} \\ \frac{19}{6}y=0 \\ y=0 \\ x=20+\frac{1}{3}\cdot \:0 \\ x=20$$
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 8 - Systems of Linear Equations and Problem Solving - 8.2 Solving by Substitution or Elimination - 8.2 Exercise Set - Page 517: 39
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