SOLUTION: Al is 2 years older than Bob. Bob is 4 years younger than Carl. The sum of the three friends age is 42 years. how old is Bob?

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Question 1108484: Al is 2 years older than Bob. Bob is 4 years younger than Carl. The sum of the three friends age is 42 years. how old is Bob?
Answer by stanbon(75887) About Me  (Show Source):
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Al is 2 years older than Bob. Bob is 4 years younger than Carl. The sum of the three friends age is 42 years. how old is Bob?
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Equations:
A = B+2
B = C-4
A + B + C = 42
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Substitute for A and C and solve for "B":
B+2 + B + B+4 = 42
3B + 6 = 42
B = 12 yrs
A = B+2 = 14 yrs
C = B+4 = 16 yrs
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Cheers,
Stan H.
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