Hi, 

Let x represent amount of $13/kg coffee , then (252-x) is the amount of 11/kg coffee

13x + 11(252kg-x) = 12*252kg

2x = 12*252kg - 11*252kg

2x = 252kg

x = 126 kg  venezuelan coffee and 126 kg kenyan coffee



checking our answer

13*126 + 11*126 = 1638 + 1386 = 3024 =  12*252 

Answer by mananth(16946)   (Show Source): You can put this solution on YOUR website!
 a store mixes kenyan coffee worth $11 per kilogram and venezuelan coffee worth $13 per kilogram. The mixture is to sell for $12 per kilogram. Find how much of each should be used to make a 252-kilogram mixture.



kenyan coffee worth $11 per kilogram : let this be x kg

venezuelan coffee worth $13 per kilogram. : 252-x kg



 mixture is to sell for $12 per kilogram. 252-kilogram mixture.

...

11x + 13(252-x)= 12*252

11x+3276-13x = 3024

-2x=-252

x = 171 kg ----------- kenyan coffee

171 kg venezuela coffee

...

m.ananth@hotmail.ca 

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