Bobby is 3 years older than Chris. Last year, the sum of their ages was 39.
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Bobby is 3 years older than Chris. Last year, the sum of their ages was 39.
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Answer:
Chris is 18 years old last year
19 today
Bobby is 21 years old last year
22 today
Step-by-step explanation:
Let Chris be x
Let Bobby be x+3
Sum of their ages is 39 Last year
so:
x+x+3=39
2x+3-3=39-3
2x=36
2x/2=36/2
x=18
Chris is 18 years old last year
19 today
Bobby is 18+3= 21 years old last year
22 today