Three students, Simone, Jeffrey, and Enzo, are washing cars for a fund-raiser. If all three students wash 1 car, it will take y minutes. If Simone washes the car alone, it takes 40 minutes. If Jeffrey washes the car alone, it takes 35 minutes.

If it takes Enzo x minutes to wash the car alone, which equation represents the amount of time it takes for the three students to wash the car?