Answer:
4 days
Explanation:
If 8 machines can complete a task in 7 days, how long will 14 machines take?
So, it is obvious that if the number of machines increases, the number of days taken to complete the task decreases; thus proving that this is an indirect / inverse proportion.
Let's take x as the number of days we need to find out.
8 machines : 7 days
14 machines : x days
14 × x = 8 × 7
14x = 56
x =

x = 4