There are 210 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1310 cents. How many 5-cent stamps are there?
There are 250 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 880 cents. How many 3-cent stamps are there?
There are 220 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1340 cents. How many 5-cent stamps are there?
There are 240 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 1050 cents. How many 4-cent stamps are there?
There are 270 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1800 cents. How many 8-cent stamps are there?
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There are 230 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1950 cents. How many 8-cent stamps are there?
There are 200 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1260 cents. How many 6-cent stamps are there?
There are 150 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 890 cents. How many 7-cent stamps are there?
There are 160 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 980 cents. How many 7-cent stamps are there?
There are 150 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 820 cents. How many 6-cent stamps are there?
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