|
There are 200 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 950 cents. How many 3-cent stamps are there?
There are 230 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1510 cents. How many 5-cent stamps are there?
There are 150 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 520 cents. How many 3-cent stamps are there?
There are 240 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 960 cents. How many 3-cent stamps are there?
There are 180 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1140 cents. How many 6-cent stamps are there?
|
There are 130 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 580 cents. How many 4-cent stamps are there?
There are 160 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 830 cents. How many 3-cent stamps are there?
There are 210 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1040 cents. How many 4-cent stamps are there?
There are 190 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1340 cents. How many 8-cent stamps are there?
There are 180 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1280 cents. How many 8-cent stamps are there?
|