algebra1
posted by jimmy .
subtract:
7z/z5  4z9/5z

algebra1 
Reiny
I am sure you meant:
(7z)/(z5)  (4z9)/(5z)
= (7z)/(z5) + (4z9)/(z5)
= (7z + 4z9)/(z5)
= (3z2)/(z5)
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