There are exactly four ordered pairs of positive integers (x, y) that satisfy the equation 20 x+11 y=881. Mehdi writes down the four values of y and adds the smallest and largest of these values. What is this sum?
There are exactly four ordered pairs of positive integers (x, y) that satisfy the equation 20 x+11 y=881. Mehdi writes down the four values of y and adds the smallest and largest of these values. What is this sum?