This year, my grandfather's age is six times that of Xiao Ming. In a few years, my grandfather's age will be five times that of Xiao Ming. In a few years, my grandfather's age will be four times that of Xiao Ming

This year, my grandfather's age is six times that of Xiao Ming. In a few years, my grandfather's age will be five times that of Xiao Ming. In a few years, my grandfather's age will be four times that of Xiao Ming

Suppose grandfather is x years old, then Xiao Ming is y years old. The first year passed a, and the second year passed B, x = 6yx + a = 5 (y + a) x = 5Y + 4ax + A + B = 4 (y + A + b) x = 4Y + 3A + 3b solution x = 24a, y = 4A, B = 5A3 according to the actual a = 3, B = 5Y = 12x = 72 A: grandfather is 72 years old