Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 6 - Systems of Equations and Inequalities - 6-3 Solving Systems Using Elimination - Practice and Problem-Solving Exercises - Page 380: 44



Work Step by Step

$x+y=7$ $8x+19y=100$ $x+y-y=7-y$ $x=7-y$ $x=7-y$ $8x+19y=100$ $8(7-y)+19y = 100$ $56-8y+19y = 100$ $56+11y=100$ $56+11y-56=100-56$ $11y=44$ $11y/11 = 44/11$ $y=4$
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