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There are 260 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1370 cents. How many 4-cent stamps are there?
There are 140 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 800 cents. How many 5-cent stamps are there?
There are 190 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1470 cents. How many 6-cent stamps are there?
There are 200 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1660 cents. How many 7-cent stamps are there?
There are 200 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1520 cents. How many 7-cent stamps are there?
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There are 260 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1970 cents. How many 8-cent stamps are there?
There are 220 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 810 cents. How many 4-cent stamps are there?
There are 190 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 770 cents. How many 5-cent stamps are there?
There are 230 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1320 cents. How many 4-cent stamps are there?
There are 230 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 1020 cents. How many 4-cent stamps are there?
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