ricardo is considering two monthly plans a dog-walking service offers. Plan 1 charges $3 per walk plus $10 for grooming at the end of each month. Plan 2 charges $5 per walk and then offers free grooming at the end of each month. Enter an equation to model the number pf walks, w, when the two plans coat the same amount. How many walks will it take for the two plans to cost Ricardo the same amount?