Problema Solution
Ten years ago, John was 4 times as old as Bill. Now he is only twice as old as Bill. Find their present ages.
Answer provided by our tutors
Let 'j' and 'b' stand for John and Bill's current ages. We can write:
(j-10)=4(b-10)
j=2b
Solving for b and j, we get:
b=15
j=30