You can put this solution on YOUR website! Let
Present age of Sobha = s years old
13 years ago Sobha was = s-13 years old
13 later Sobha will be = s+13 years old
Sobha age 13 yrs ago is half her age 13 years later
s-13=1/2(s+13)
2(s-13)=s+13
2s-26=s+13
2s-s=13+26
s=39
