Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 4 - Section 4.1 - Solving Systems of Linear Equations in Two Variables - Exercise Set - Page 212: 47

Answer

Ordered Pair Solution $(9,9)$

Work Step by Step

We have $$(1)5x-2y=27$$ $$(2)-3x+5y=18$$ 3(1) + 5(2) $$15x-15x-6y+25y = 81 +90$$ $$19y = 171$$ $$y=9$$ Solving for $x$ $$x=(27+2(9))\div5 = 9$$ Ordered Pair Solution $(9,9)$
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