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There are 180 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 850 cents. How many 5-cent stamps are there?
There are 200 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1310 cents. How many 7-cent stamps are there?
There are 180 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 740 cents. How many 5-cent stamps are there?
There are 230 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1720 cents. How many 8-cent stamps are there?
There are 170 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 610 cents. How many 3-cent stamps are there?
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There are 140 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 750 cents. How many 5-cent stamps are there?
There are 180 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 780 cents. How many 6-cent stamps are there?
There are 260 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 2210 cents. How many 8-cent stamps are there?
There are 180 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 760 cents. How many 5-cent stamps are there?
There are 230 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1500 cents. How many 7-cent stamps are there?
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