Answer:
mass in grams /over/ volume in cubic centimeters!
Step-by-step explanation:
Let x be the width of the train;
50.6ft =6x-5.8ft <--- solve for x
50.6+5.8=6x
56.4 ft=6x
56.4/6=x
9.4 ft = x
Therefore the width of the train is 9.4 ft
Hope I helped :)