We are given: Barrel quantity averages = 50 pounds.
Crate quantity = 120 pounds.
Number of barrels is taken by variable x and
Number of crates is taken by variable y.
The elevator load should be greater than of total load.
Therefore,
50 * number of barrels + 120 * number of crates > Total load.
50*x +120*y > Total load.
50x +120y > total load.