Answer
$-3m+n$
Work Step by Step
The distributive property holds that $a(b+c)=ab+ac$ (for real numbers $a$, $b$, and $c$).
Therefore, $-(3m-n)=(-1\times3m)-(-1\times n)=-3m-(-n)=-3m+n$.
Intermediate Algebra (12th Edition)
by Lial, Margaret L.; Hornsby, John; McGinnis, Terry
Published by
Pearson
ISBN 10:
0321969359
ISBN 13:
978-0-32196-935-4
Chapter R - Section R.4 - Properties of Real Numbers - R.4 Exercises - Page 37: 24
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