Mariadne decidió regalar a Perla 1/3 y a Vannesa 2/7 de sus estampas ¿Con que parte de sus espatampas se quedó mariadne ¿Cuantas estampas tenia mariadne al comienzo si al final se quedo con 64?

Delbert keeps track of total of the total number of points he earns on homework assignments, each of which is worth 60 points. at the end of the semester he has 810 points. write an equation for delbert’s average homework score a in terms of the number of assignments n.