Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 9 - 9.2 - Two Variable Linear Systems - 9.2 Exercises - Page 647: 36


$x=-2; y=5$

Work Step by Step

Multiply the second equation by $-1$, and then add the new equation to equation $2$. $-x+3y-4x-3y=17-7 $ This yields $x=-2$ Now, we will plug the value of $x$ into the second equation to get the value of $y$. $-4(-2)-3y=-7 \\ \implies y=5$ Thus, $x=-2; y=5$
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