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bobby is 3 years older than chris.Last year,the sum of their ages was 39.How old is each now?

Sagot :

So, let's identify the given first

Chris - x
Bobby - x + 3

(x) + (x + 3) = 39

2x = 39-3

2x = 36
2      2

x=18
x + 3 = 21

18 + 21 = 39

So, since that was a year ago, now, Chris is 19 then Bobby is 22