Answer:
The costs are never exactly the same. But they are EXACT in 1.86 months. The cost being 102.14.
Explanation:
Try setting up an equation for both of them, setting them equal and then solving.
First Gym Cost = 156 + 29x Where x is the number of months
Second Gym Cost = 55x
156+29x=55x
84x=156
x=156/84