Mr. and Mrs. North joined a local fitness club. The club charges each member a $25.00 registration fee and a monthly membership fee. They were billed a total of $500.00 for two 12-month memberships.How much is the club's monthly membership fee?

First you subtract double the registration fee from the total and then divide by 24
You get 500-50= 450
450/24=18.75
Hope this helped