Bruce bought two books. one book cost $4.00 more than three times the other. toghter, the two books cost him 72

I think you would divide 72 by 3 to get 24i think you would divide 72 by 3 to get 24 then subtract 4 from 24 to get 20.
Therefore 1 book cost $20 and the other cost $52. I may be wrong though.

Jim has run 5/6 of a mile so far. i hope that answers your question! good luck : )