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There are 220 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1410 cents. How many 8-cent stamps are there?
There are 270 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1920 cents. How many 8-cent stamps are there?
There are 180 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 890 cents. How many 3-cent stamps are there?
There are 140 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1170 cents. How many 8-cent stamps are there?
There are 220 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1520 cents. How many 8-cent stamps are there?
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There are 180 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 820 cents. How many 3-cent stamps are there?
There are 280 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1570 cents. How many 7-cent stamps are there?
There are 210 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 930 cents. How many 5-cent stamps are there?
There are 160 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 590 cents. How many 4-cent stamps are there?
There are 270 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 1220 cents. How many 5-cent stamps are there?
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