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There are 170 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1150 cents. How many 5-cent stamps are there?
There are 150 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 700 cents. How many 5-cent stamps are there?
There are 190 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1170 cents. How many 7-cent stamps are there?
There are 200 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 850 cents. How many 4-cent stamps are there?
There are 230 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1520 cents. How many 8-cent stamps are there?
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There are 220 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1320 cents. How many 7-cent stamps are there?
There are 180 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1200 cents. How many 7-cent stamps are there?
There are 160 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1190 cents. How many 8-cent stamps are there?
There are 200 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1360 cents. How many 8-cent stamps are there?
There are 150 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 910 cents. How many 5-cent stamps are there?
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