I think the answer would be 90 students were taken on the trip. I may be wrong, so wait for more answers to come in!
Answer:
x=-3.5
Step-by-step explanation:
-3x=10.5 divide both sides by -3
If I remember correctly it is equal
12 students would create 4 groups, if they get 8 cubic meters per hour and they have 5 hours, the equasion would look like: (8*5)*4)=160. They would clear 160 cubic meters in 5 hours.