46.Cargo was delivered to three warehouses. 400 tons were delivered to the first and second warehouses, 300 tons were delivered to the second and third warehouses together, and 440 tons were delivered to the first and third warehouses. How many tons of cargo were delivered to each warehouse separately?
46. Let's write the condition as: $I$ warehouse $+I I$ warehouse $=400$ t.; $I I$ warehouse $+I I I$ warehouse $=300$ t.; $I$ warehouse $+I I I$ warehouse $=440$ t.

Then, "adding" these three conditions, we get that the doubled sum of the loads on the three warehouses is 1140 t., and the sum is 570 t. From this: on the $I I I$ warehouse, there were $570-440=170$ t. of cargo, on the $I I$ warehouse $570-440=130$ t., and on the $I$ warehouse $570-300=270$ t.

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