<PRE><B>Question 849908</B>
Brand C sells 21g bags of chocolate that contain 29% saturated 
fats. To make their product they combine Brand A chocolate which 
contains 35% saturated fats and Brand B chocolate which contains 
25% saturated fats. To obtain one bag of chocolate brand C, how 
much of A and B do they need to use? 
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Equation:
fat + fat = fat
0.35x + 0.25(21-x) = 0.29*21
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35x + 25*21 - 25x = 29*21
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10x = 4*21
x = (2/5)(21
x = 8.8 grams (amt. of 35% product needed)
21-8.8  = 12.2 grams (amt. of 25% product needed)
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Cheers,
Stan H.
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