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There are 280 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1790 cents. How many 5-cent stamps are there?
There are 180 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 980 cents. How many 5-cent stamps are there?
There are 200 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1680 cents. How many 8-cent stamps are there?
There are 200 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 880 cents. How many 7-cent stamps are there?
There are 200 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1090 cents. How many 5-cent stamps are there?
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There are 210 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 930 cents. How many 5-cent stamps are there?
There are 220 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1870 cents. How many 8-cent stamps are there?
There are 170 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 750 cents. How many 4-cent stamps are there?
There are 250 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 1120 cents. How many 4-cent stamps are there?
There are 180 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1190 cents. How many 7-cent stamps are there?
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