Bruce Lee paid 45.6 yuan for one kilogram of candy and three kilogram of biscuits. Xiao Li paid 21.6 yuan for the same candy and biscuits. How much is each kilogram of candy and biscuits

Bruce Lee paid 45.6 yuan for one kilogram of candy and three kilogram of biscuits. Xiao Li paid 21.6 yuan for the same candy and biscuits. How much is each kilogram of candy and biscuits

Suppose x yuan per kilogram of candy and Y yuan per kilogram of biscuit, the equation system is: x + 3Y = 45.6, x + y = 21.6, the solution equation system is: x = 9.6, y = 12 A: 9.6 yuan per kilogram of candy and 12 yuan per kilogram of biscuit

Bruce Lee paid 45.6 yuan for one kilogram of candy and three kilogram of biscuits. Xiao Li paid 21.6 yuan for the same kilogram of candy and biscuits______ 、______ Yuan

(45.6-21.6) △ 3-1, = 24 △ 2, = 12 (yuan), 21.6-12 = 9.6 (yuan). A: this kind of candy and biscuit is 9.6 yuan and 12 yuan per kilogram respectively. So the answer is: 9.6 yuan and 12.6 yuan

Mother paid 36 yuan for 2kg candy and 1kg biscuit, 30 yuan for 1kg candy and 2kg sugar
How much is candy and biscuit per kilogram?
Don't use equations, use formulas
fast

Candy = (36 × 2-30) / (2 × 2-1) = 14 yuan / kg
Biscuit = 36-14 × 2 = 8 yuan / kg

The price of a new brand beverage is 10 yuan in large bottle (1200ml) and 2 yuan in small bottle (200ml)
In order to promote this kind of beverage, three stores of a, B and C have launched preferential sales strategies. Store a: buy a large bottle and get a small bottle free; store B: 10% off for both large and small bottles; store C: 20% off for more than 30 yuan. 20 students get together to prepare 300ml drinks for everyone. Which store is more cost-effective? Please write down your comparison method

A: 300 × 20 ／ (1200 + 200) = 4 × 10 + 2 × (400 ／ 200) = 44 yuan; B: unit price big bottle is cheaper than small bottle, so buy big bottle, 300 × 20 ／ 1200 = 5 bottle, pay 5 × 10 × 90% = 45 yuan; C: unit price big bottle is cheaper than small bottle, so buy big bottle