SOLUTION: Juan Valdez sells two types of coffee bean. The higher quality kind has 17% coffee and the ordinary kind has only 10% coffee. He gets an order for 50 tons of beans with 12% coffe

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Question 447167: Juan Valdez sells two types of coffee bean. The higher quality kind has 17% coffee and the ordinary kind has only 10% coffee. He gets an order for 50 tons of beans with 12% coffee. How much of each kind should he mix to get the desired percent?
I've tried (17x+10y)/2=13.5 - but that goes nowhere. Can you help me find the equation so I can solve the problem? Thanks
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
a classic mixture problem

(17%)(x) + (10%)(50 - x) = (12%)(50)