Question

Ravi tells his daughter Aarushi , "seven years ago , I was seven times as old as you will be" . If present ages of Aarushi and Ravi are x and y respectively represent the situation schematically.

Answer 1

Answer:

7 years ago,

age of Ravi=7+x

age of aarushi=7+y

according to question,

7+x=7(7+y)

7+x=49+7y

7-49+x-7y=0

x-7y-42=0