Which expression represents the quotient of 5 and y, decreased by the product of 3 and z? In equation form

Amovie streaming service charges it’s customers $15 a month. martina has $98 saved up. will she have any money left over if she pays for the maximum amount of months she can afford? explain.

Equation for the calculation double 2 and then add 5

Math it's appreciated. (picture provided)