Answer:
2 months, they will have paid 75 dollars
Explanation:
Gym A
25+ 25m where m is the number of months
Gym B
55 + 10m
Set them equal
25+25m = 55+10m
Subtract 10m from each side
25+25m-10m = 55+10m-10m
25+15m = 55
Subtract 25 from each side
25+15m-25 = 55-25
15m = 30
Divide by 15
15m/15 = 30/15
m=2
After 2 months
25+25(2) = 25+50 = 75
The cost is 75 dollars