There are 250 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 1120 cents. How many 5-cent stamps are there?
There are 200 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1000 cents. How many 7-cent stamps are there?
There are 190 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1090 cents. How many 4-cent stamps are there?
There are 230 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1050 cents. How many 3-cent stamps are there?
There are 160 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 860 cents. How many 6-cent stamps are there?
|
There are 190 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 880 cents. How many 4-cent stamps are there?
There are 270 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 2020 cents. How many 7-cent stamps are there?
There are 230 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1600 cents. How many 8-cent stamps are there?
There are 150 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1050 cents. How many 6-cent stamps are there?
There are 190 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1190 cents. How many 8-cent stamps are there?
|