Question

a gym holds one 60- minute exercise class on Saturday and several 45 minute classes lasted a total of 285 minutes. write a equation to find the number of weekday classes

Answer 1

Assuming the 45 min classes were on the weekdays, this is the equation I would use:

60+45a=285

Where 60 is the Saturday class, 45a are the 45 minute weekday classes times a amount of classes and 285 is the total amount of minutes.

Also, here is how to solve the equation to find the number of weekday classes, which is 5.
60+45a=285
-60 -60
45a=225
----- -----
45 45
a=5