Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 1 - Foundations for Algebra - 1-9 Patterns, Equations, and Graphs - Practice and Problem-Solving Exercises: 52

Answer

-30

Work Step by Step

When a positive number is subtracted from a negative, the negative becomes more negative. Thus, it follows: $-18-12=-30$
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