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There are 240 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 980 cents. How many 3-cent stamps are there?
There are 170 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1030 cents. How many 7-cent stamps are there?
There are 120 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 800 cents. How many 5-cent stamps are there?
There are 210 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1130 cents. How many 8-cent stamps are there?
There are 220 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1380 cents. How many 7-cent stamps are there?
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There are 210 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1130 cents. How many 3-cent stamps are there?
There are 170 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 990 cents. How many 3-cent stamps are there?
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There are 260 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 1000 cents. How many 3-cent stamps are there?
There are 170 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1450 cents. How many 8-cent stamps are there?
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