Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 8 - Section 8.1 - Linear Equations with Two Variables - Exercises - Page 297: 30


$ y= \frac{x}{3}-3$

Work Step by Step

By subtracting $x$ from each side and then dividing each side by $-3$, we get: $$x-3y=9\Longrightarrow -3y=9-x \\ \Longrightarrow y=-\frac{9-x}{3}=\frac{x}{3}-3 .$$
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