s=sunitha's age
k=kavitha's age
s is 24 older than k
s=24+k
6 years ago (s-6 and k-6), sunitha was thrise as old as kavita
s-6=3(k-6)
subsitute 24+k for s
24+k-6=3(k-6)
k+18=3(k-6)
distribute
k+18=3k-18
minus k both sides
18=2k-18
add 18 both sides
36=2k
divide by 2 both sides
18=k
sub back
s=24+k
s=24+18
s=42
sunitha is 42 years old
kavita is 18 years old
