Answer
$x=1$,$y=2$;$(1,2)$
Work Step by Step
$x+2y = -7$ $(1)$
$x+y=-3$ $(2)$
Subtract Equation $(2)$ and Equation $(1)$ and we get
$y=-4$
Substitute this back into Equation $(2)$
$x-4=-3$
$x=1$
College Algebra (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0321979478
ISBN 13:
978-0-32197-947-6
Chapter 8 - Section 8.1 - Systems of Linear Equations: Substitution and Elimination - 8.1 Assess Your Understanding - Page 555: 20
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