2t = distance boy walked to meet the girl

60 – 3t = distance girl walked to meet the boy

and when they meet they are at the same location so the two equations are equal therefore:

2t = 60-3t

2t + 3t = 60

5t = 60

t = 12

boy meets girl 12 seconds later at 2*12 = 24 meters

or girl meets boy at 60 – (3*12) = 24

Now, when they both meet, their time is the same. Obviously, the girl would probably have traveled farther. So if the girl traveled y meters then boy must traveled 60-y meters.

If you got the equation right, you should get 12 seconds. I leave the where to you.