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There are 140 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 560 cents. How many 3-cent stamps are there?
There are 250 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1690 cents. How many 5-cent stamps are there?
There are 180 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 890 cents. How many 3-cent stamps are there?
There are 230 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1740 cents. How many 6-cent stamps are there?
There are 150 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1050 cents. How many 8-cent stamps are there?
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There are 230 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1360 cents. How many 8-cent stamps are there?
There are 180 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 600 cents. How many 3-cent stamps are there?
오늘 6원짜리 4원짜리 우표 총 130 장을 사고, 660 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?
There are 200 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1000 cents. How many 6-cent stamps are there?
There are 270 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1380 cents. How many 6-cent stamps are there?
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