491  Stamp
How many stamps? 1

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There are 170 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1120 cents. How many 7-cent stamps are there?



There are 210 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1080 cents. How many 4-cent stamps are there?



There are 180 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1150 cents. How many 6-cent stamps are there?



There are 180 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1390 cents. How many 8-cent stamps are there?



There are 260 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1940 cents. How many 7-cent stamps are there?

There are 220 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1550 cents. How many 8-cent stamps are there?



There are 220 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1780 cents. How many 7-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1660 cents. How many 8-cent stamps are there?



There are 270 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 1200 cents. How many 4-cent stamps are there?



There are 120 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 890 cents. How many 7-cent stamps are there?

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