SOLUTION: John is twice as old as his friend peter.peter is 5 years older than Alice.in 5 years John will be three times as old as Alice .how old is peter now?
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Question 1022174: John is twice as old as his friend peter.peter is 5 years older than Alice.in 5 years John will be three times as old as Alice .how old is peter now? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = Alice's age now
Let = Peter's age now
Let = John's age now
------------------------
(1)
(2)
(3)
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Substitute (2) into (1)
(1)
Substitute this result into (3)
(3)
(3)
(3)
and
(2)
(2)
and
(3)
(3)
(3)
(3)
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Peter is 5
John is 10
Alice has just been born
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check:
1)
1)
(1)
and
(2)
(2)
(2)
and
(3)
(3)
(3)
(3)
OK
