138  Stamp
How many stamps? 1

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There are 270 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1680 cents. How many 8-cent stamps are there?



There are 220 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1400 cents. How many 8-cent stamps are there?



There are 270 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1330 cents. How many 3-cent stamps are there?



There are 180 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1080 cents. How many 7-cent stamps are there?



There are 240 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1380 cents. How many 3-cent stamps are there?

There are 230 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1480 cents. How many 8-cent stamps are there?



There are 200 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 900 cents. How many 3-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1700 cents. How many 8-cent stamps are there?



There are 270 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1530 cents. How many 3-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1410 cents. How many 8-cent stamps are there?

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