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In western Africa, shell money was used as legal tender up until the mid-19th century. In West Central Africa, shells were the currency of the "Kingdom of Kongo," called Nzimbu. The king's revenue was estimated at 30,000,000 shells, with every adult male being required to pay annually 1000 shells for himself, 1000 for every pack-ox, and 2000 for every servantin his household.In the countries on the coast, the shells were fastened together in strings of 40 or 100 each, such that fifty or twenty strings respectively represented a "dollar."

In 1825 in Nzimbu, a man has three times as many pack-oxen as servants and pays the king eight "dollars."

From the table, select the value of each variable consistent with the given information. Make only two selections, one in each column.

number of servants

number of pack-ox






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