Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 6 - Systems of Equations and Inequalities - 6-1 Solving Systems by Graphing - Practice and Problem-Solving Exercises - Page 367: 21


$10$ classes

Work Step by Step

$x=$ classes, $y=$ total cost You have the equations $20+3x=y$ and $5x=y$. $20x+3x=5x$ $20x=2x$ $10=x$
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