Q. A farmers in Alberta often deliver wheat to grain elevators using grain truck, which are a type of dump truck.

Question

A farmer make two trips to a grain elevator. The grain elevator manager measures the combined mass of the farmer's truck and wheat in tonnes (t), and then calculates the bushels of wheat dumped from the truck

Table:
Combined Mass of truck and wheat (t):
16.2
21.6

Bushels of Wheat (Bu):
300
500

a) write a linear equation to represent this situation. Use this equation to determine the combined mass of the truck and the wheat in tonnes when the truck is loaded with 600 bushels of wheat.

b. Use the equation to determine the mass of the farmer's truck in tonnes.

I having hard time doing this question when it come to word problem. Can someone please help me?
Thank You very much!!!!