Answer
$-12$
Work Step by Step
$-9+(-3)=-12$
If you start with $-9$ and move $3$ units to the left on a number line, you end up with $-12$.
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 1 - Foundations for Algebra - 1-5 Adding and Subtracting Real Numbers - Practice and Problem-Solving Exercises - Page 34: 17
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