Homework Help: algebra

Posted by Christina on Monday, August 13, 2012 at 3:32pm.

A store mixes Brazilian coffee worth $11 per kilogram and Venezuelan coffee worth $15 per kilogram. The mixture is to sell for $14 per kilogram. Find how much of each is needed to to make a 216-kilogram mixture.

Brazilian coffee needed-

Venezuelan coffee needed-

algebra - Steve, Monday, August 13, 2012 at 3:38pm
11B + 15V = 14(B+V)
B+V = 216

11B + 15(216-B) = 14*216
B = 54
V = 162

check:
11*54 + 15*162 = 3024 = 14*216

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