Step-by-step explanation: Let 
Let 
y 
 be the total fee, and 
x 
 the number of months. 
 
Equation 1: 
 
y 
= 
50 
+ 
55 
x 
 
Equation 2: 
 
y 
= 
200 
+ 
45 
x 
 
Solve the system for 
x 
and 
y 
: 
 
50 
+ 
55 
x 
= 
200 
+ 
45 
x 
 
10 
x 
= 
150 
 
x 
= 
15 
 
y 
= 
200 
+ 
45 
( 
15 
) 
 
y 
= 
875 
 
∴ 
 The total amount paid to both gyms is equal after 
15 
 months and will be 
$ 
875 
. 
 
Hopefully this helps!