Answer
$-3b-21$
Work Step by Step
$-3[b-(-7)]$ change subtraction to addition by changing the sign of following term
$-3[b+7]$ use the distributive property
$(-3)(b)+(-3)(7)$ multiply
$-3b-21$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 1 - Foundations for Algebra - Chapter Test - Page 73: 17
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