623  Stamp
How many stamps? 1

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There are 160 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1220 cents. How many 7-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 990 cents. How many 5-cent stamps are there?



There are 250 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1970 cents. How many 7-cent stamps are there?



There are 260 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1600 cents. How many 7-cent stamps are there?



There are 180 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 980 cents. How many 7-cent stamps are there?

There are 270 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 2130 cents. How many 7-cent stamps are there?



There are 160 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1060 cents. How many 7-cent stamps are there?



There are 170 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1030 cents. How many 7-cent stamps are there?



There are 220 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1880 cents. How many 8-cent stamps are there?



There are 240 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 1100 cents. How many 5-cent stamps are there?

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