Question

Sumi is now 9 years older than her brother.
In 10 years, sumi win be twice as old as
her brother was 10 years ago. Find
their present ages​

Answer 1

Answer:

let present age of sumi brother be x

sumi be x+9

ATO

x+9+10 =2(x-10)

x+19= 2x-20

19+20= 2x-x

39=x

present age of sumi brother is 39

sumi age =39+9=48