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Each of the two warehouses has several tons of grain. After 25% of the grain is transported from warehouse A to warehouse B, it is transported from warehouse A to warehouse B 25% from warehouse B to warehouse A. at this time, the storage beams of warehouse A and warehouse B are equal. What percentage of warehouse A is warehouse B?
0.75 a + 0.25 (B + 0.25 a) = 0.75 (B + 0.25 a)
0.8125 a + 0.25 B = 0.75 B + 0.1875 a
625 a = 0.5 B
A / b = 0.5 / 0.625 = 0.8 = 80%
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