exam Maths Puzzle Numerical Ability

how do i do this problem.....f-215 sitting over 16= 5sitting over 8

Read Solution (Total 0)

exam Other Question

Train A leaves a station traveling at 40 mph. Eight hours later trian B leaves the same staion in the same direction at 60 mgh. How long does it take for train B to catch up to train A? Thanks so much for helping me. 5-2x=3x-7x+25

5(d+4)=7(d-2)

3g-3=3(7-g)

I really just dont understand equation with both sides. So explain CLEARLY please.