Apples

A 2 kg of apples cost a certain sum of money. This sum is equal to the amount of kilograms for which we pay 72 CZK. How much is 1 kg of apples?

Correct result:

x =  6

Solution:

2x2=72 x2=36 x1=6 x2=6 x>0 x=x1=62x^2=72 \ \\ x^2=36 \ \\ x_{1}=6 \ \\ x_{2}=-6 \ \\ x>0 \ \\ x=x_{1}=6

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