#### Answer

-9a+b

#### Work Step by Step

-5a-4a+b
We start by combining like terms. The like terms in this equation are -5a and -4a because they both contain 'a'.
-9a+b

Published by
Prentice Hall

ISBN 10:
0133186024

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

-9a+b

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