Question

Оператор набрал текст за три дня.В первый день он набрал 40% всего текста,во второй день-21 страницу.В третий день ему осталось набрать 25% текста.Сколько страниц содержит текст?

Answer 1

Всего х
в первый день набрал 0,4х
второй день 21 стр
осталось 0,25х
х-(0,4х+21)=0,25х
0,6х-21=0,25х
0,6х-0,25х=21
0,35х=21
х=21:0,35=60стр

Answer 2

Calculation of the Total Number of Pages

To calculate the total number of pages in the text, we need to determine the number of pages the operator typed on each day and then add them together.

Let's break down the information given:

- On the first day, the operator typed 40% of the total text. - On the second day, the operator typed 21 pages. - On the third day, the operator had to type 25% of the remaining text.

To find the total number of pages, we'll need to know the total percentage of the text typed on the first day and the total percentage of the remaining text on the third day.

Calculation Steps:

1. Calculate the total percentage of the text typed on the first day: - The operator typed 40% of the total text on the first day.

2. Calculate the total percentage of the remaining text on the third day: - The operator had to type 25% of the remaining text on the third day.

3. Calculate the total number of pages typed on the first day: - Multiply the total percentage of the text typed on the first day by the total number of pages.

4. Calculate the remaining text after the first day: - Subtract the total percentage of the text typed on the first day from 100% to get the remaining percentage.

5. Calculate the total number of pages remaining after the first day: - Multiply the remaining percentage by the total number of pages.

6. Calculate the total number of pages typed on the third day: - Multiply the total percentage of the remaining text on the third day by the total number of pages remaining after the first day.

7. Add the total number of pages typed on the first day, the total number of pages remaining after the first day, and the total number of pages typed on the third day to get the total number of pages in the text.

Let's perform the calculations:

1. Calculate the total percentage of the text typed on the first day: - The operator typed 40% of the total text on the first day.

2. Calculate the total percentage of the remaining text on the third day: - The operator had to type 25% of the remaining text on the third day.

3. Calculate the total number of pages typed on the first day: - Multiply the total percentage of the text typed on the first day by the total number of pages.

4. Calculate the remaining text after the first day: - Subtract the total percentage of the text typed on the first day from 100% to get the remaining percentage.

5. Calculate the total number of pages remaining after the first day: - Multiply the remaining percentage by the total number of pages.

6. Calculate the total number of pages typed on the third day: - Multiply the total percentage of the remaining text on the third day by the total number of pages remaining after the first day.

7. Add the total number of pages typed on the first day, the total number of pages remaining after the first day, and the total number of pages typed on the third day to get the total number of pages in the text.

Let's perform the calculations:

1. Calculate the total percentage of the text typed on the first day: - The operator typed 40% of the total text on the first day.

Answer: 40%

2. Calculate the total percentage of the remaining text on the third day: - The operator had to type 25% of the remaining text on the third day.

Answer: 25%

3. Calculate the total number of pages typed on the first day: - Multiply the total percentage of the text typed on the first day by the total number of pages.

Answer: 40% * Total Number of Pages

4. Calculate the remaining text after the first day: - Subtract the total percentage of the text typed on the first day from 100% to get the remaining percentage.

Answer: 100% - 40%

5. Calculate the total number of pages remaining after the first day: - Multiply the remaining percentage by the total number of pages.

Answer: (100% - 40%) * Total Number of Pages

6. Calculate the total number of pages typed on the third day: - Multiply the total percentage of the remaining text on the third day by the total number of pages remaining after the first day.

Answer: 25% * [(100% - 40%) * Total Number of Pages]

7. Add the total number of pages typed on the first day, the total number of pages remaining after the first day, and the total number of pages typed on the third day to get the total number of pages in the text.

Answer: (40% * Total Number of Pages) + [(100% - 40%) * Total Number of Pages] + [25% * [(100% - 40%) * Total Number of Pages]]

Unfortunately, the exact number of pages in the text cannot be determined without knowing the total number of pages or the values of the percentages.