When half of a bottle of alcohol is used, the weight of the bottle is 700k. If one third of the alcohol is used, the weight of the bottle is 800K? Please, everyone I need the formula and the answer

When half of a bottle of alcohol is used, the weight of the bottle is 700k. If one third of the alcohol is used, the weight of the bottle is 800K? Please, everyone I need the formula and the answer

（800-700）÷（1/2-1/3）=600
700-600×（1-1/2）=400
Or 800-600 × (1-1 / 3) = 400

When one third of the alcohol is used, the weight of the bottle is 800g. When one half of the alcohol is used, the weight of the bottle is 700g. How much is the weight of the bottle?

Alcohol weight: (800-700) / (1 / 2-1 / 3) = 600
Bottle weight: 700-600 * 1 / 2 = 400

How many kilograms can a bottle of 800 grams of alcohol hold water? How many kilograms can it hold gasoline?
Answer now! Urgent! Now!

1000 grams of water, 900 grams of oil

A bottle of alcohol, when 1 / 3 of the alcohol is removed, weighs 800g in total; when 1 / 2 of the alcohol is removed, weighs 700g in total

First, draw a circle, divide the circle into six equal parts with three diameters, paint two adjacent pieces with red to represent 1 / 3, and paint three pieces with blue to represent 1 / 2. Remove the overlap, that is 1 / 6, the mass of 1 / 6 = 800-700 = 100. So the total weight of alcohol is 600, and the bottle weight is 700-600 * 1 / 2 = 400