#### Answer

$2k-2m$

#### Work Step by Step

We can directly remove the first set of parenthesis. But, to remove the second set of parenthesis, we need to distribute -1 to both terms, $m$ and $-k$. $(k-m)-(m-k)=k-m-m+k=2k-2m$.

Published by
Prentice Hall

ISBN 10:
0133186024

ISBN 13:
978-0-13318-602-4

$2k-2m$

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