Answer
$(1,3)$
Work Step by Step
$x+y=4$ Equation$(1)$
$y=3x$ Equation$(2)$
Substituting $y=3x$ in Equation$(1)$
$x+y=4$
$x+3x=4$
$4x=4$
$x=1$
Substituting $x$ value in Equation$(2)$
$y=3x$
$y=3(1)$
$y=3$
Solution : $(1,3)$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 4 - Sections 4.1-4.3 - Integrated Review - Systems of Linear Equations - Page 234: 5
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