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There are 200 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 880 cents. How many 5-cent stamps are there?
There are 250 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1600 cents. How many 8-cent stamps are there?
There are 210 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1590 cents. How many 7-cent stamps are there?
There are 220 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1650 cents. How many 7-cent stamps are there?
There are 280 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 2110 cents. How many 8-cent stamps are there?
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There are 190 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1190 cents. How many 5-cent stamps are there?
There are 150 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 520 cents. How many 3-cent stamps are there?
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There are 240 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 820 cents. How many 3-cent stamps are there?
There are 210 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 950 cents. How many 5-cent stamps are there?
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