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?

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)
------------------------
Substitute (2) into (1)
(1)
Substitute this result into (3)
(3)
(3)
(3)
and
(2)
(2)
and
(3)
(3)
(3)
(3)
----------------
Peter is 5
John is 10
Alice has just been born
-------------------
check:
1)
1)
(1)
and
(2)
(2)
(2)
and
(3)
(3)
(3)
(3)
OK
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