Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 7 - Review Exercises - Page 876: 3



Work Step by Step

Re-arrange the given two equations and then use the addition method to get $(20x+12y)+(-9x-12y)=4+18$ This gives: $11x=22$ or, $x=2$ when $x=2$ then we have $5(2)+3y=1 \implies y=-3$ Hence, our answers are: $(2,-3)$
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