311  Stamp
How many stamps? 1

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There are 160 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 560 cents. How many 4-cent stamps are there?



There are 260 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1490 cents. How many 7-cent stamps are there?



There are 180 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1140 cents. How many 6-cent stamps are there?



There are 190 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 880 cents. How many 4-cent stamps are there?



There are 190 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1040 cents. How many 6-cent stamps are there?

There are 180 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 980 cents. How many 5-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 890 cents. How many 5-cent stamps are there?



There are 180 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1280 cents. How many 8-cent stamps are there?



There are 180 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 900 cents. How many 4-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1480 cents. How many 8-cent stamps are there?

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