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There are 140 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 770 cents. How many 3-cent stamps are there?
There are 260 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 920 cents. How many 4-cent stamps are there?
There are 230 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1010 cents. How many 3-cent stamps are there?
There are 230 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1290 cents. How many 8-cent stamps are there?
There are 280 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 2370 cents. How many 8-cent stamps are there?
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There are 160 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 930 cents. How many 3-cent stamps are there?
There are 250 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 1010 cents. How many 3-cent stamps are there?
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There are 250 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1700 cents. How many 8-cent stamps are there?
There are 130 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 860 cents. How many 8-cent stamps are there?
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