Multiply them back into each other... You would multiply your answer with the number you divided by (the number ouside the table if you used the table... ) and you should get the larger number you divided.
First, distribute the 3 into (-4z+5w):
3w+12z-15w+4z
Combine like terms:
3w-15w+12z+4z
-12w + 16z
The correct expression for this question would be: (50+85)+ n(11+8). That is assuming that it was 50$ transportation for everyone, not 50$ per person (and also 85$).
Hope I was able to help! If you need any further assistance, please let me know and I will help you!