Answer:
5 4/5 b - 3 17/30
Explanation:
5 4/5 b+6 3/4 −(2 11/15 +7 7/12)=
5 4/5 b + 6+ 3/4 - 9- 11/15 - 7/12 =
5 4/5 b - 3 -11/15 + 9/12- 7/12=
5 4/5 b - 3 - 11/15 + 2/12=
5 4/5 b - 3- 11/15 + 1/6=
5 4/5 b- 90/30- 22/30+ 5/30=
5 4/5 b - 107/30=
5 4/5 b - 3 17/30