Question

The ratio of the present ages of Mohan and Gopal is 7:9. Nine years ago, the ratio of their ages was 2:3. Find their present ages.

Answer 1

7x-9/9x-9=2/3
3x=9
X=3
Mohan =21
gopal= 27

Answer 2

7x-9/9x-9*2/3
21x-27=18x-18
21x-18x=-18+27
3x=9
x=9/3
x=3
mohan=7*3=21
gopal=9*3=27