Answer
$z=6$
Work Step by Step
Divide both sides of the equation by -3 to isolate the variable.
$-18=-3z$
$-3z=-18$
$\frac{-3z}{-3}$=$\frac{-18}{-3}$
$z=6$
Check the answer.
-18=-3(6)
-18=-18
Introductory Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-805-X
ISBN 13:
978-0-13417-805-9
Chapter 2 - Section 2.2 - The Multiplication Property of Equality - Exercise Set - Page 130: 11
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