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?

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) (Show Source): You can put this solution on YOUR website!
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?
--------------------
Equations:
A = B+2
B = C-4
A + B + C = 42
----------------------
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
------------
Cheers,
Stan H.
-----------
RELATED QUESTIONS
Bob is 10 years older than kim. The sum of their age is 60. How old is... (answered by ikleyn)

bob is two years older than jim. if the sum of their ages is 104 years. how old is bob? (answered by stanbon)

Jim is older than Bob. Together, they are 60 years old. If Bob is 8 years younger than... (answered by FrankM)

Sue is 2 years older than mary.mary is 3 years younger than bob. How old is bob (answered by Boreal)

Bob is seven years younger than twice Susan's age. the sum of their ages is 29. How old (answered by josgarithmetic)

Bob is six years older than his sister, and the sum of their ages is 32. How old is... (answered by Marth)

Bob is 5 years younger than twice mark's age. Bob is 31 how old is mark (answered by rfer)

Bob is 5 years younger than twice marks age. Bob is 31.How old is Mark? (answered by macston)

Dan is twice as old as Bob and four times as old as Al. � Charles is four years younger (answered by ikleyn)