Answer:
4 months
Step-by-step explanation:
Let
x = number of months
Workout plus = 100 + 30x
Fit works = 20 + 50x
After how many months will memberships to both gyms cost the same amount?
Equate the cost of both gyms
Workout plus = Fit works
100 + 30x = 20 + 50x
100 - 20 = 50x - 30x
80 = 20x
x = 80/20
x = 4 months
After 4 months, memberships to both gyms cost the same amount