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There are 190 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1420 cents. How many 8-cent stamps are there?
There are 210 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 930 cents. How many 4-cent stamps are there?
There are 180 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 820 cents. How many 4-cent stamps are there?
There are 180 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1020 cents. How many 4-cent stamps are there?
There are 250 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1360 cents. How many 4-cent stamps are there?
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There are 240 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1700 cents. How many 8-cent stamps are there?
There are 210 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 700 cents. How many 3-cent stamps are there?
There are 200 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1160 cents. How many 8-cent stamps are there?
There are 190 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 670 cents. How many 3-cent stamps are there?
There are 200 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1520 cents. How many 8-cent stamps are there?
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