Answer:
The days will it take them to have the same number of followers is:
6 days.
Step-by-step explanation:
To solve the proposed exercise, an equation must be made for each one taking into account the information obtained:
Followers Celebrity A = 400 + 75d
Followers Celebrity B = 1000 - 25d
Where d is the number of days elapsed. Since you want to identify the day in which they will have the same number of followers, you proceed to match the two equations:
400 + 75d = 1000 - 25d
And you clear the variable d (remember that those who are adding to one side of equality, go to the other side to subtract and, if they are subtracting to one side of equality, go to add):
400 + 75d = 1000 - 25d
75d + 25d = 1000 - 400
100d = 600
d = 600/100
d = 6 days
