Answer
0
Work Step by Step
We apply the order of operations:
$8 - 3(9 - 2) \div 21 - 7=8-3(7)\div21-7=8-21\div21-7=8-1-7=7-7=0$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 1 - Section 1.2 - Order of Operations - Exercise - Page 14: 28
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