There are 190 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1030 cents. How many 5-cent stamps are there?
There are 220 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1620 cents. How many 5-cent stamps are there?
There are 190 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 870 cents. How many 6-cent stamps are there?
There are 190 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 850 cents. How many 5-cent stamps are there?
There are 170 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 810 cents. How many 6-cent stamps are there?
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There are 160 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1060 cents. How many 6-cent stamps are there?
There are 210 stamps which are 7-cent stamps and 6-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 9-cent stamps. Altogether they cost 1230 cents. How many 3-cent stamps are there?
There are 180 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1110 cents. How many 5-cent stamps are there?
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