Answer
10 classes
Work Step by Step
x = classes, y = total cost
$20 + 3x = y$, $5x = y$
$20 + 3x = 5x$
$20 +3x - 3x = 5x-3x$
$20 = 2x$
$20/2 = 2x/2$
$10 = x$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 6 - Systems of Equations and Inequalities - 6-1 Solving Systems by Graphing - Practice and Problem-Solving Exercises - Page 363: 21
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