Question 1158046
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If the problem were only to determine who is oldest, then logical reasoning immediately tells us it is Carl.<br>
To find Carl's age, I would use a different strategy than the other tutor.<br>
Given:
A+B = 25
A+C = 29
B+C = 32<br>
Add the three equations:
2(A+B+C) = 86
A+B+C = 43<br>
Carl's age is the sum of all three ages, minus the sum of Al's and Bill's ages.
C = (A+B+C)-(A+B) = 43-25 = 18.<br>
The ages of the others can be found, if needed, in a similar way.<br>