Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 7 - Section 7.1 - Systems of Linear Equations in Two Variables - Exercise Set - Page 818: 6



Work Step by Step

There are two equations that we can use: y=2x and x+y=6. Since y=2x is already simplified in which one variable is isolated from x we can substitute this equation into x+y=6. x+y=6 x+2x=6 Solve for x. First combine like-terms. 3x=6 Then divide by 3 on both sides. $\frac{3x}{3}$=$\frac{6}{3}$ x=2 Substitute x=2 into y=2x to solve for y. y=2(2) y=4 The ordered pair would then be (2,4) since x=2 and y=4
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