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There are 180 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1090 cents. How many 8-cent stamps are there?
There are 210 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1110 cents. How many 3-cent stamps are there?
There are 170 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 710 cents. How many 5-cent stamps are there?
There are 150 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 680 cents. How many 4-cent stamps are there?
There are 240 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 1110 cents. How many 3-cent stamps are there?
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There are 210 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 990 cents. How many 3-cent stamps are there?
There are 120 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 610 cents. How many 3-cent stamps are there?
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There are 220 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 740 cents. How many 3-cent stamps are there?
There are 220 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1420 cents. How many 6-cent stamps are there?
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