A bridge can hold a maximum of 75,000 pounds. A truck that weighs 40,000 pounds carries boxes that weigh 40 pounds each. What is the maximum number of boxes the truck can carry to cross the bridge? Express your answer as an inequality.
Let x be the number of boxes the truck can carry.
The weight of the boxes is 40*x pounds.
The inequality is 40*x + 40,000 <= 75,000 pounds. Answer: \boxed{875}.