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Sam is 12 years older than John. For the last four years, Sam and John have been friends. Five years ago, Sam was 5 times as old as John. How old is Sam now?

 Jan 21, 2020
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J = John age now                     five years ago   j-5

S = Sam age now = J+12         five years ago  5 (j-5)

 

J + 12      - 5    = 5 (J-5)

J + 7 = 5J - 25

4J = 32

J = 8                       Sam now = J + 12 = 20    y/o

 Jan 21, 2020

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