Answer
$3x-18y-8z$
Work Step by Step
We simplify by removing the parentheses and then add the like terms as follows:
$$
(4x -7y - z) + (2x - 5y - 3z) + (-3x - 6y- 4z)\\
=4x -7y - z + 2x - 5y - 3z-3x - 6y- 4z\\
=3x-18y-8z
.$$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 5 - Section 5.3 - Addition and Subtraction of Polynomials - Exercise - Page 221: 24
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