Intermediate Algebra (12th Edition)

Published by Pearson
ISBN 10: 0321969359
ISBN 13: 978-0-32196-935-4

Chapter 3 - Section 3.1 - Systems of Linear Equations in Two Variables - 3.1 Exercises - Page 226: 21


$x=1$ $y=2$

Work Step by Step

Equation 2 is already solved for y, we substitute y in the first equation, with the expression in the second: $4x+y=6$ $4x+2x=6$ $x=1$ $y=2x=2$ We need to check, if it is the right solution, we substitute x with 1 and y with 2: $4(1)+2=6$ $\checkmark$ $2=2(1)$ $\checkmark$
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