|
There are 170 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 580 cents. How many 4-cent stamps are there?
There are 150 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 700 cents. How many 4-cent stamps are there?
There are 200 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1290 cents. How many 6-cent stamps are there?
There are 180 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1240 cents. How many 8-cent stamps are there?
There are 210 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1380 cents. How many 6-cent stamps are there?
|
There are 220 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1460 cents. How many 7-cent stamps are there?
There are 270 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1610 cents. How many 5-cent stamps are there?
오늘 3원짜리 7원짜리 우표 총 190 장을 사고, 890 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?
There are 280 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 2370 cents. How many 8-cent stamps are there?
There are 200 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1220 cents. How many 5-cent stamps are there?
|