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The students went for a picnic and bought 20 ham sausages and 15 bottles of mineral water The students went to have a picnic and bought 20 ham sausages and 15 bottles of mineral water. They added the condition of equality and then solved it by equation method. The students went to have a picnic and bought 20 ham sausages and 15 bottles of mineral water, which is 1.2 yuan each. How much is the mineral water per bottle?
The students went for a picnic and bought 20 sausages and 15 bottles of mineral water. The total cost was 54 yuan. The sausages cost 1.2 yuan each. How much is the mineral water per bottle?
Set each bottle of mineral water X Yuan
20·1.2+15·x=54
24+15x=54
Transfer, get
15x=30
The coefficient is reduced to one
x=2
A: 2 yuan per bottle of mineral water
According to the information provided in the figure below, what are the prices of a T-shirt and a bottle of mineral water?
Suppose the price of a T-shirt is: X Yuan, then the price of a bottle of mineral water is: 26 − X3 yuan. From the Title Meaning: 2x + 2 × 26 − X3 = 44 to simplify: 4x = 80, the solution is: x = 20 yuan. Therefore, the price of a T-shirt and a bottle of mineral water are: 20 yuan and 2 yuan respectively
The drawer of a desk is 50cm long and 30cm wide. How many square centimeters of wood do you need to make this drawer
The problem is short of a condition. You can find it by substituting the data into the following formula
Need board 50 x 30 + (50 + 30) x 2 x height = (cm2)
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