Let x be the age of Ben and y be the age of Ishaan. x= 4y... Equation (1) x= y + 6... Equation (2) Subtract the 2 equations (1) - (2) : x-x= 4y - (y+ 6) 0 = 4y - y - 6 0 = 3y - 6 3y = 6 y = 2 So Ishaan is 2 years old Substitute y = 2 in equation (1) x = 4(2) x = 8 So Ben is 8 years old and Ishaan is 2 years old.