Today is Lakshmi's birthday.She turned 24.Lakshmi is twice as old as Ramu was when Lakshmi was as old as Ramu now.How old is Ramu now?
let x be Bob's age now
let x-y be bobs age then.
hence Alice's age then=24-y which is also equal to x cuz Alice's age then=Bob's age now
and Alice's age now =2(x-y)=24
x-y=12
SO:
24-y=x
y=24-x
Substituting in other equation:
x-(24-x)=12
x=18
let x-y be bobs age then.
hence Alice's age then=24-y which is also equal to x cuz Alice's age then=Bob's age now
and Alice's age now =2(x-y)=24
x-y=12
SO:
24-y=x
y=24-x
Substituting in other equation:
x-(24-x)=12
x=18