For a project, team a and team B work together in 6 days, team a work alone in 15 days, and team B work alone in 15 days______ It will be finished in three days

For a project, team a and team B work together in 6 days, team a work alone in 15 days, and team B work alone in 15 days______ It will be finished in three days

It takes 10 days for team B to do it alone

For a project, team a and team B work together in 6 days, team a work alone in 15 days, and team B work alone in 15 days______ It will be finished in three days

It takes 10 days for team B to do it alone

For a project, it takes 6 days for Party A and Party B to cooperate, 15 days for Party A and how many days for Party B,

It takes X days to set up B
According to the meaning of the title:
6（1/15+1/X）=1
The solution of this equation is as follows
X=10
After inspection:
X = 10 is the solution of the listed fractional equation
A: B needs 10 days

The construction team has to build 6 kilometers of roads in 10 days. After 1.2 meters of roads have been built in the first two days, the plan has changed. It needs to complete the task two days in advance, and the average daily speed of road construction in the next few days
This is a practical problem of linear inequality of one variable. As soon as possible

1.2m?
1.2m: 0.0012 + 6x = 6
1.2km: 1.2 + 6x = 6
You should be able to solve it