Answer
x = -3
y = 9
Work Step by Step
x + y = 6; y=-3x
Substitute y for -3x to the first equation.
x -3x = 6
-2x = 6
x = -3 (divide both sides by -2 )
Substitute x=-3 to the second equation.
y = -3 $\times$ (-3)
y = 9
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 4 - Section 4.2 - Solving Systems of Linear Equations by Substitution - Exercise Set - Page 300: 3
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