A delivery person uses a service elevator to bring boxes of books up to an office. The delivery person weighs 160 lb and each box of books w

We can model this with the following inequality

50x + 160 ≤ 1000      where x is the number of boxes....so, subtracting 160 from each side, we have

50x ≤ 840                  divide both sides by 50

x ≤ 16.8 boxes     ....but since he can't bring up partial boxes, round down to 16