Question

father tells his son,"five years ago, I was seven times as old you were. after five year, I will be three times as old you will be ". obtain a pair of linear equations in two variable

Answer 1

let father's age five years ago be x
so son's age was x/7
now five years later father's age will be x+10
so son's age will be (x+10)/3
therefore x/7+10=(x+10)/3