Question 1069453
Let W = the weight that the large truck can carry.
Let w = the weight that each of the small trucks can carry.
The large truck can carry at least 800 pounds more than one of the small trucks:
W = w + 800 -> w = W - 800 [1]
Also, the large truck can carry no more than 1/3 of what all four of the small trucks combined can carry:
W = 1/3(4w) = (4/3)w
Substituting [1] gives W = (4/3)(W-800) -> W/3 = 3200/3, or W = 3200
Ans: 3200 lbs.