SOLUTION: Bob's father is 3 times old as Bob. 4 years ago, he was 4 times older. How old is Bob?

SOLUTION: Bob's father is 3 times old as Bob. 4 years ago, he was 4 times older. How old is Bob?

Algebra.Com

Question 38374: Bob's father is 3 times old as Bob. 4 years ago, he was 4 times older. How old is Bob?
Answer by fractalier(6550) (Show Source): You can put this solution on YOUR website!
Always assign variables in age problems in the NOW.
Let B be Bob's age NOW.
Let F be the father's age NOW.
From the problem,
F = 3B
F - 4 = 4(B - 4)
Substituting, we get
3B - 4 = 4B - 16
-B = -12
and
B = 12
RELATED QUESTIONS
BOB'S FATHER IS 3 TIMES OLD AS BOB. 4 YEARS AGO HE WAS 4 TIMES OLDER. HOW OLD IS... (answered by uksraj)

Bob's father is 3 times old as Bob. 4 years ago, he was 4 times older. How old is... (answered by fractalier)

bob's father is 3 times old as bob. 4 years ago, he was 4 times older. how old is... (answered by AAfter Search,ganeshindia)

Bob's father is 3 times old as Bob. 4 years ago, he was 4 times older. How old is... (answered by srinivas.g)

Bob's father is 3 times old as Bob. 4 years ago, he was 4 times older. How old is Bob? (answered by lwsshak3)

BOB'S FATHER AGE IS 3 TIMES OLD AS BOB.4 YEARS AGO,HE WAS 4 TIMES OLDER.HOW OLD IS... (answered by Fombitz)

Bob's father is 3 times old as Bob.4 years ago,he was 4 times older.How old is... (answered by uday1435)

Sarah is 2 times as old as Bob, 6 years ago Sarah was 4 times as old as Bob, how old is... (answered by Cromlix)

John is 5 years older than bob. Three years ago he was twice as bob. How old is... (answered by ankor@dixie-net.com)