Where do they meet?

Question

Sue begins counting backwards from 1298 by 4's saying one number every 5 seconds. At the same time Jim begins counting forward from 171 by 3's, saying one number every 5 seconds. What number will they both say at the same time?

Answer 1

1298 - 4s = 171+3s

7s = 1127

s = 161

161 x 5 = 805 seconds when they both say the same number, 654

171+3(161) = 171+483 = 654 for Jim

1298-4(161)= 1298-644= 654 for Sue