Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 3 - Cumulative Review: 22



Work Step by Step

We are given that $7x+3y=21$. To solve for y, first subtract 7x from both sides. $3y=21-7x$ Divide both sides by 3. $y=\frac{21-7x}{3}=7-\frac{7x}{3}$
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