Coffee

A coffee merchant has Robusta and Arabica coffee beans. 1 kg of Robusta costs 450 CZK, and 1 kg of Arabica is 300 CZK more expensive. Calculate how many kilograms of Robusta and Arabica will need to produce 30 kg of the mixture so that the mixture costs 490 CZK per 1 kg.

Final Answer:

r =  26 kg
a =  4 kg

Step-by-step explanation:

m=30 kg  r+a=m 450r+(450+300)a=m 490 r+a=30 450r+(450+300)a=30 490  450 r+(450+300) a=30 490  a+r=30 750a+450r=14700  Pivot:Row1Row2  Row27501 Row1Row2 0.4r=10.4  r=0.410.4=26 a=75014700450r=75014700450 26=4  a=4 r=26=26 kg



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