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There are 230 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 870 cents. How many 3-cent stamps are there?
There are 120 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 710 cents. How many 8-cent stamps are there?
There are 210 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1410 cents. How many 7-cent stamps are there?
There are 140 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1000 cents. How many 8-cent stamps are there?
There are 240 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1780 cents. How many 7-cent stamps are there?
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There are 160 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 870 cents. How many 5-cent stamps are there?
There are 230 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1200 cents. How many 6-cent stamps are there?
There are 200 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1140 cents. How many 7-cent stamps are there?
There are 210 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 970 cents. How many 5-cent stamps are there?
There are 250 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1630 cents. How many 6-cent stamps are there?
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