Answer
Yes, it is a solution.
Work Step by Step
$x+3=y\longrightarrow$ substitute 1 for x and 4 for y
$1+3\overset?=4$
$4=4\checkmark$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 3 - Solving Inequalities - 3-8 Unions and Intersections of Sets - Mixed Review - Page 220: 57
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