Coffee

Coffee merchant has coffee robusta and arabica species. 1 kg Robusta is worth 450 CZK, and Arabica 1 kg 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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