364  Stamp
How many stamps? 1

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There are 150 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 770 cents. How many 7-cent stamps are there?



There are 270 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1290 cents. How many 3-cent stamps are there?



There are 150 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 530 cents. How many 3-cent stamps are there?



There are 240 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1320 cents. How many 3-cent stamps are there?



There are 140 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1120 cents. How many 7-cent stamps are there?

There are 120 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 510 cents. How many 3-cent stamps are there?



There are 180 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1290 cents. How many 8-cent stamps are there?



There are 150 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 660 cents. How many 3-cent stamps are there?



There are 170 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1390 cents. How many 7-cent stamps are there?



There are 140 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 820 cents. How many 8-cent stamps are there?

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