There are 190 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1110 cents. How many 5-cent stamps are there?
There are 220 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 970 cents. How many 5-cent stamps are there?
There are 190 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 960 cents. How many 6-cent stamps are there?
There are 160 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 880 cents. How many 7-cent stamps are there?
There are 210 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1560 cents. How many 7-cent stamps are there?
|
There are 130 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 710 cents. How many 5-cent stamps are there?
There are 180 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1330 cents. How many 7-cent stamps are there?
There are 210 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 990 cents. How many 3-cent stamps are there?
There are 180 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1180 cents. How many 5-cent stamps are there?
There are 270 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1290 cents. How many 3-cent stamps are there?
|