A man is four times as old as his son. In 3 years, the father will be three times as old as the son. How old is each now?
NOW m = 4s
in three years they will BOTH be +3 years
m+3 = 3(s+3) sub in m = 4s
4s + 3 = 3s+9
s = 6 m = 24 y/o