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There are 160 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 750 cents. How many 3-cent stamps are there?
There are 190 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1050 cents. How many 5-cent stamps are there?
There are 250 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1450 cents. How many 5-cent stamps are there?
There are 160 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 700 cents. How many 4-cent stamps are there?
There are 220 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1340 cents. How many 5-cent stamps are there?
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There are 220 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1010 cents. How many 3-cent stamps are there?
There are 180 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 830 cents. How many 4-cent stamps are there?
There are 180 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 750 cents. How many 3-cent stamps are there?
There are 250 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1200 cents. How many 4-cent stamps are there?
There are 270 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1900 cents. How many 8-cent stamps are there?
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