Question

В магазине за 3 дня продали 110 кг масла. Во второй день было продано 3/8 того, что было продано в первый день , а в третий день столько , сколько было продано в первый и во второй день вместе. Сколько килограммов масла было продано в магазине в первый день?

Answer 1

Х-продано в 1й день
3/8х- во й
х+3/8х= 1 3/8х=11/8х- в 3й

х+3/8х+11/8х=110
х+14/8х=110
4/4 х+7/4х=110
11/4х=110
х=110:11/4=110*4/11=10*4=40кг-продано в 1й день

Answer 2

Question Analysis

To answer this question, we need to determine the amount of oil sold on the first day in a store where 110 kg of oil was sold over a period of three days. On the second day, 3/8 of what was sold on the first day was sold, and on the third day, the same amount was sold as on the first and second days combined.

Calculation

Let's calculate the amount of oil sold on the first day.

Let's assume the amount of oil sold on the first day is x kg.

According to the given information: - On the second day, 3/8 of what was sold on the first day was sold. So, the amount sold on the second day is (3/8)x kg. - On the third day, the same amount was sold as on the first and second days combined. So, the amount sold on the third day is (x + (3/8)x) kg.

The total amount of oil sold over three days is 110 kg. Therefore, we can write the equation:

x + (3/8)x + (x + (3/8)x) = 110

Simplifying the equation:

(8/8)x + (3/8)x + (8/8)x + (3/8)x = 110

(22/8)x = 110

Multiplying both sides by (8/22):

x = (110 * 8) / 22

x ≈ 40 kg

Therefore, approximately 40 kg of oil was sold on the first day in the store.

Answer

Approximately 40 kg of oil was sold in the store on the first day.

Note: The calculation assumes that the amount of oil sold on each day is measured in kilograms.