|
There are 160 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 820 cents. How many 4-cent stamps are there?
There are 200 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 900 cents. How many 4-cent stamps are there?
There are 200 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1200 cents. How many 3-cent stamps are there?
There are 270 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1730 cents. How many 4-cent stamps are there?
There are 140 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 800 cents. How many 5-cent stamps are there?
|
There are 120 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 460 cents. How many 3-cent stamps are there?
There are 220 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1680 cents. How many 8-cent stamps are there?
¿À´Ã 7¿øÂ¥¸® 4¿øÂ¥¸® ¿ìÇ¥ ÃÑ 280 ÀåÀ» »ç°í, 1570 ¿øÀ» ÁöºÒ ÇßÀ»¶§, ¸î°³ÀÇ 7¿øÂ¥¸® ¿ìÇ¥¸¦ »ò´Â°¡?
There are 240 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1590 cents. How many 5-cent stamps are there?
There are 250 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1700 cents. How many 6-cent stamps are there?
|