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: 8

Answer

(22, 7)

Work Step by Step

Add the two equations to eliminate x. $-x+5y=13$ $\underline{\ \ \ x-\ \ y=15}$ $\ \ \ \ \ \ \ \ \ \ \ 4y=28$ Solve for y. $4y=28$ $4y\div4=28\div4$ $y=7$ Substitute 7 for y in either equation and solve for x. $x-y=15$ $x-7=15$ $x-7+7=15+7$ $x=22$
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