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There are 170 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1040 cents. How many 8-cent stamps are there?
There are 210 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1380 cents. How many 7-cent stamps are there?
There are 120 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 870 cents. How many 6-cent stamps are there?
There are 250 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 1010 cents. How many 5-cent stamps are there?
There are 180 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1260 cents. How many 6-cent stamps are there?
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There are 240 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1560 cents. How many 6-cent stamps are there?
There are 280 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 1140 cents. How many 5-cent stamps are there?
There are 210 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1520 cents. How many 8-cent stamps are there?
There are 200 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1160 cents. How many 5-cent stamps are there?
There are 170 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1040 cents. How many 8-cent stamps are there?
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