My father said, "this year, the age ratio between my grandfather and Xiao Ming is 7:1. My grandfather is 60 years older than Xiao Ming. How old is my grandfather this year“

My father said, "this year, the age ratio between my grandfather and Xiao Ming is 7:1. My grandfather is 60 years older than Xiao Ming. How old is my grandfather this year“

If 70 years old, set grandfather's age as X: X-1 / 7, x = 60, x = 70.0k