<PRE><B>Question 421150</B>
Let x=distance from school that Mona lives
Then 2x=distance from school that John lives
Now here we make an assumption:
John and Mona travel to school AND back home each day
So:
2(x)+2(2x)=8.7 
2x+4x=8.7
6x=8.7
x=1.45 km
2x=2.90 km----------------distance from school that John lives

Hope this helps---ptaylor</PRE>