SOLUTION: add rational expression with common denomiation -8z-2u/-7z - 9z-9u/7z

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Question 92000: add rational expression with common denomiation
-8z-2u/-7z - 9z-9u/7z
Answer by stanbon(48568) About Me  (Show Source):
You can put this solution on YOUR website!
-8z-2u/-7z - 9z-9u/7z
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Multiply numerator and denominator of the 1st fraction by -1 to get:
= (8z+2u)/7z - (9z-9u)/7z
The denominators are the same to combine the numerators to get:

=[8z+2y-9z+9u]/7z
=[-z + 11u]/7z
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Cheers,
Stan H.