Answer
$x=3$
$y=-1$
Work Step by Step
$x+y=2 \rightarrow y=2-x$
$2x+y=5 $
Substitute $y=2-x$ into the second equation.
$2x+2-x=5$
$x=3$
Substitute for x and solve for y.
$y=2-3$
$y=-1$
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 10 - Section 10.1 - Systems of Linear Equations in Two Variables - 10.1 Exercises - Page 688: 14
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