Answer:
After 4 months, the charges will be same.
Explanation:
Membership charges of club one = $40
Per month charges = $40
Let,
x be the number of months
y be the total amount
y = 40x + 40
Membership charges of club two = $100
Per month charges = $25
y = 25x + 100
For equal charges, both equations will be same
40x + 40 = 25x + 100
40x - 25x = 100 - 40
15x = 60
Therefore,
After 4 months, the charges will be same.