A mom's age was 46 and her son's age was 21 in 1997. After some years the mom's age is 6 times her son's age. What are their ages?
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let y = no. yrs ago mom was 6 times as old as the son
46-y=6(21-y)
46-y=126-6y
-y+6y=126-46
5y=80
y=80/5
y=16yrs
1997-16= 1981 mom was 6 times
confirm this by son finding how old was 16yr ago
46-16 = 30
21-16=5
6×5 =30
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