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There are 170 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1060 cents. How many 8-cent stamps are there?
There are 190 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 660 cents. How many 4-cent stamps are there?
There are 150 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 950 cents. How many 6-cent stamps are there?
There are 250 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1550 cents. How many 5-cent stamps are there?
There are 150 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 750 cents. How many 3-cent stamps are there?
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There are 220 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1540 cents. How many 5-cent stamps are there?
There are 190 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 830 cents. How many 4-cent stamps are there?
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There are 160 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 690 cents. How many 4-cent stamps are there?
There are 180 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1260 cents. How many 8-cent stamps are there?
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