|
There are 250 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1760 cents. How many 8-cent stamps are there?
There are 140 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 770 cents. How many 7-cent stamps are there?
There are 240 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1240 cents. How many 7-cent stamps are there?
There are 150 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 680 cents. How many 4-cent stamps are there?
There are 180 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 840 cents. How many 3-cent stamps are there?
|
There are 210 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 760 cents. How many 4-cent stamps are there?
There are 210 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1110 cents. How many 3-cent stamps are there?
There are 220 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1180 cents. How many 7-cent stamps are there?
There are 240 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 980 cents. How many 5-cent stamps are there?
There are 170 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1240 cents. How many 8-cent stamps are there?
|