Bruce Lee paid 45.6 yuan for 1 kg of candy and 3 kg of biscuits, while Xiao Li paid 21.6 yuan for the same candy and biscuits How much is this candy and biscuit per kilogram?

Bruce Lee paid 45.6 yuan for 1 kg of candy and 3 kg of biscuits, while Xiao Li paid 21.6 yuan for the same candy and biscuits How much is this candy and biscuit per kilogram?

Set X yuan per kilogram for candy and Y yuan per kilogram for biscuit
x+3y=45.6
x+y=21.6
x=9.6
y=12
So candy is 9.6 yuan per kilogram, biscuit is 12 yuan per kilogram
That's all. Hope it works

Bruce Lee paid 44.2 yuan for 1kg of sugar and 3kg of biscuits, while Xiao Li paid 48.2 yuan for 2kg of sugar and 2kg of biscuits?

Sugar 14.05
Biscuit 10.05

Bruce Lee paid 44.2 yuan for 3kg biscuits and 1kg candy, while Xiao Li paid 24.2 yuan for the same candy and biscuits

The same candy and biscuit 1 kg each?
Unit price of biscuit: (44.2-24.2) △ 2 = 10 yuan
Unit price of candy: 24.2-10 = 14.2 yuan