There are 170 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 760 cents. How many 3-cent stamps are there?
There are 260 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1260 cents. How many 3-cent stamps are there?
There are 160 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 930 cents. How many 3-cent stamps are there?
There are 130 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 670 cents. How many 7-cent stamps are there?
There are 230 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 910 cents. How many 3-cent stamps are there?
|
There are 230 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1480 cents. How many 6-cent stamps are there?
There are 190 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1230 cents. How many 7-cent stamps are there?
There are 190 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1340 cents. How many 8-cent stamps are there?
There are 140 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 800 cents. How many 4-cent stamps are there?
There are 230 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 990 cents. How many 5-cent stamps are there?
|