Answer
$-21$
Work Step by Step
Replace $x$ with 3 and $y$ with -30 in $3x+y$:
$3x+y=3\times(3)+(-30)=9+(-30)=-21$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 2 - Section 2.2 - Adding Integers - Exercise Set - Page 113: 63
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