Answer
z=-4
Work Step by Step
$-3z=12$ $\longrightarrow$ multiplication property
$-3z\div-3=12\div-3$ $\longrightarrow$ simplify
$z=-4$
Substitute to check.
$-3(-4)=12$
$12=12\checkmark$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 2 - Section 2.6 - Solving Equations: The Addition and Multiplication Properties - Exercise Set - Page 148: 19
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