Mixture 15903

How many kg of red candies at the price of CZK 65 per 1 kg must be added to 5 kg of blue sweets at the cost of CZK 140 per 1 kg, when the price of the mixture should be CZK 120 per 1 kg.

Correct answer:

a =  1.8182 kg

Step-by-step explanation:

65a+5 140=120 (a+5)  65 a+5 140=120 (a+5)  55a=100  a=55100=1.81818182  a=11201.818182=1.8182 kg

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