Question

the present ages of Three persons in the ratio 4:7:9 years ago, the sum of their ages was 56. find their present ages in years.

Answer 1

4x+7x+9x=56
20x=56
x=56/20
x=14/5
x=2.8
x=3
4x=4×3=12
7x=7×3=21
9x=9×3=27