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 1

Alice --- x
Peter --- x+5
John ---- 2x+10

5 years from now:
John -- 2x+15
Alice -- x+5

2x+15 = 3(x+5)
-x = 0
x = 0

This question is bogus, even though the answer meets the original conditions.
Unless Alice was just born, it makes little sense

i.e.
Alice -- 0 years
Peter --5 years
John -- 10 years

in 5 years:
Alice = 5
Peter = 10
John = 15 ---> John is indeed 3 times as old as Alice

Check your typing of it, or the question itself

Answer 2

5 years