|
There are 220 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1180 cents. How many 3-cent stamps are there?
There are 200 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 760 cents. How many 3-cent stamps are there?
There are 210 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1730 cents. How many 7-cent stamps are there?
There are 150 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1000 cents. How many 7-cent stamps are there?
There are 170 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1230 cents. How many 6-cent stamps are there?
|
There are 200 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1350 cents. How many 8-cent stamps are there?
There are 150 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 800 cents. How many 6-cent stamps are there?
오늘 5원짜리 4원짜리 우표 총 120 장을 사고, 550 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?
There are 210 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1230 cents. How many 7-cent stamps are there?
There are 260 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1420 cents. How many 5-cent stamps are there?
|