How many days to complete? How many days does it take to complete the mission?

Let the total quantity of work be 1

A did x in one day alone, then team B did it alone in one day and completed nine-tenths of the forty minus x by the equation:

3 times x + (nine-tenths minus x) multiplied by 5 = seven-eighths.

Solution: x = one-eighth.

That is, Team A does it alone and completes one-eighth of the day, and Team B does it alone for one day and completes nine-tenths of the forty minus one-eighth = one-tenth.

Solution: It takes a day for B to be completed alone. Analysis:

A does 3 days, B does 5 days, 7 8, A is 7 8-5 a=(7a-40) 8a, efficiency is (7a-40) 8a 3=(7a-40) 24a. A and B cooperate is 9 40 per day, so.

7a-40)/24a+1/a=9/40

40(7a-40)+960=216a

280a-1600+960=216a

64a=640

a=10

Solution: If team B is completed in x days, then the work efficiency of team A is (9 40-1 x), according to the topic, 3*(9 40-1 x)+5 x=7 8

The solution is x=10

Set team A to complete in x days and team B in y days.

x+y=9/40

3x+5y=7/8

The result is x=1 8

y=1/10

Therefore, it takes 10 days for Team B to do it alone.

Set team A to complete 1 x of the project in one day, and team B to complete 1 y in one day

then 1 x+1 y=9 40 3 x+5 y=7 8

Get x=8 8 days to complete.

B completed in one day: (7/8 9/40 multiplied by 3) divided by 2 = 1/5.

B alone requires: 1 divided by one-fifth = 5 days.

1. On the first day.

2. On the second day.

3. On the third day.

4. On the fourth day.

5. On the fifth day.

6. The sixth day.

7. The seventh day.

8. The Last Day.

Ordinal numerals are a type of numerals, mainly spoken of in English grammar, and are represented as "first" in Chinese. Ordinal numbers are also used in birthdays to describe the date of your birth. For example: may-first (May 1st).

From September 13, 2000 to July 31, 2019, there are altogether:

2019-2000）x365+4x1-(12+31)=19x365+4-43

6896 days.

Two-thirds of 16 days divided by four equals one-sixth, which means that three people work together for one day to complete one-sixth of the total task, multiplied by three-eighths equals one-sixteenth means that C has completed one-sixteenth of the total task in one day, then it takes 16 days for C to do it alone.

If it is done by A alone, it will take (8 4 3) days.

C is 3 times faster than A, then C alone takes 8 4 = 32 days to do it.

1+4+3=8

Total: 8 times 4 divided by (1-2 3) = 96

Number of days for C to be completed alone: 96 divided by 3 = 32

Upstairs, isn't the title saying that after 4 days of completion, there are 2 3 left to be done??

How do you calculate how many days have passed?

2018 and 2019 are both common years, 365-31-28-15 = 291 days, 291 + 31 + 28 + 31 + 30 + 31 + 13 = 455 days.

From March 16, 2018 to June 13, 2019, one passed.

Sky.

From January 26 to February 15, 2019, there are a total of:

21 days.

Even 26 diaries of the day.

6+15 two 21 days. Please accept.

Around 46 years....

Is it set to 1970 ago?