Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 1 - Some Basic Concepts of Arithmetic and Algebra - 1.4 - Integers: Multiplication and Division - Problem Set 1.4: 47

Answer

4

Work Step by Step

Because multiplication is before addition or subtraction in order of operations, we first multiply and then we add and subtract. We see that we are multiplying a negative number by a negative number in this problem. Recall, when we multiply two negative numbers, the negatives will cancel out, so the answer will always be positive. We see that we are also multiplying a positive number by a negative number in this problem. Recall, when we multiply a positive by a negative, the answer will always be negative. Thus, we obtain: $5(-6)-4(-7)+3(2) \\\\-30-(-28)+6 \\\\ -30+28+6=4$
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