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A freight elevator can hold a maximum weight of 3,500 pounds.
A deliveryman weighs 200 pounds. He is delivering cartons that each
weigh 48 pounds. He wants to know how many cartons he can safely
put on the elevator at one time. Let c represent the number of cartons.

$$200 + 48c \leqslant 3500$$
$$48c \leqslant 3300$$
$$c \leqslant 68.75$$