Sam is twice as old as Bob was when Sam was 8 years younger than Bob is now the sum of their ages is 60 how old is Sam now how old was Sam then?

Sam is 26 this year. He is twice as old as Bob was when he was 13, 21 years ago. s + b = 60

s - b = -8 add the two equations

2s = 52

s = 26

b = 34

Sum = 60