Real numbers x and y satisfy
x + xy = 250y
x - xy = -240y
Enter all possible values of y, separated by commas.
x - xy = -240y add the two equations together
2x = 10y
x = 5y
5y + 5y * y = 250y
5y^2 - 245y = 0
5y ( y - 49) = 0 y = 0 y = 49
