SOLUTION: John's father is 26 years younger than John's grandfather and 29 years older than John. The sum of all the three is 135 years . What is the age of each one of them ?
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Question 1040471: John's father is 26 years younger than John's grandfather and 29 years older than John. The sum of all the three is 135 years . What is the age of each one of them ? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = John's age now
Let = John's father's age now
Let = John's grandfather's age now
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(1)
(2)
(3)
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There are 3 equations and 3 unknowns, so it's solvable
(1)
(2)
Substitute (1) and (2) into (3)
(3)
(3)
(3)
(3)
and
(2)
(2)
(2)
and
(1)
(1)
(1)
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John's age is 17
John's father's age is 46
John's grandfather's age is 72
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check:
(3)
(3)
(3)
OK
