Given :
A one-year membership to a gym costs $725.
The registration fee is $125.
To Find :
How much new members pay each month.
Solution :
Remaining fee = Total fee - Registration fee
R = $( 725 - 125 )
R = $600
Amount of fee paid monthly is :
[tex]C=\dfrac{R}{12}\\\\C = \dfrac{600}{12}\\\\C = \$50[/tex]
Therefore, monthly fee is $50.
Hence, this is the required solution.