`18,000+xle72,000`
The federal interstate weight limit for particular four-axle transfer truck is 18,000 pounds per axle. The cab (front) of the truck weighs 11,000 pounds, and the trialer of the truck, when empty, weighs 7,000 pounds. The inequalities above represents the legacally permissibel weight range for this truck when travelling on an interstate. What does the value 18,000 represent in the inequality?

A factory produced 15 trucks of the same model. If the trucks had a combined weight of 34(1)/(2) tons, how much, in pounds, did one of the trucks weight? (One ton= 2,000 pounds)

The posted weight limit for a covered wooden bridge in Pennsylvania is 6000 pounds. A delivery truck that is carrying x identical boxes each weighing 14 pounds will pass over the bridge. If the combined weight of the empty delivery truck and its driver is 4500 pounds, what is the maximum possible value for x that will keep the combined weight of the truck, driver, and boxes below the bridge’s posted weight limit?