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There are 230 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 1070 cents. How many 5-cent stamps are there?
There are 220 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1360 cents. How many 5-cent stamps are there?
There are 230 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 790 cents. How many 3-cent stamps are there?
There are 190 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 970 cents. How many 3-cent stamps are there?
There are 160 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 900 cents. How many 5-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 150 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 700 cents. How many 3-cent stamps are there?
There are 160 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 760 cents. How many 3-cent stamps are there?
There are 210 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1230 cents. How many 3-cent stamps are there?
There are 220 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1450 cents. How many 7-cent stamps are there?
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