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 216kilogram 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(216B) = 14*216
B = 54
V = 162
check:
11*54 + 15*162 = 3024 = 14*216