College Algebra (11th Edition)

Published by Pearson
ISBN 10: 0321671791
ISBN 13: 978-0-32167-179-0

Chapter 5 - Section 5.1 - Systems of Linear Equations - 5.1 Exercises - Page 486: 13


y=3 x=-1

Work Step by Step

Solve for x in the second equation x=y-10 Substitute for x in the first equation and then solve for y. 7(3y-10)-y=-10 21y-70-y=-10 20y=60 y=3 Substitute y=3 in the equation for x. x=3(3)-10 x=-1
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