Answer:

Explanation:
Number of bales to be delivered = 300
Hourly rate to unload bales = 90
Let number of hours be represented by 't'.
Also
represents the number of bales that still need to be unloaded after 't' hours.
The number of bales that still need to be unloaded after t hours can be calculated by Subtracting rate to unload bales multiplied with number of hours from Number of bales to be delivered.
framing in equation form we get;

Hence Final Answer is
.