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There are 120 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 940 cents. How many 7-cent stamps are there?
There are 230 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1190 cents. How many 4-cent stamps are there?
There are 160 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1180 cents. How many 8-cent stamps are there?
There are 190 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1030 cents. How many 4-cent stamps are there?
There are 220 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1060 cents. How many 7-cent stamps are there?
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There are 150 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 590 cents. How many 5-cent stamps are there?
There are 180 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1410 cents. How many 6-cent stamps are there?
오늘 3원짜리 5원짜리 우표 총 120 장을 사고, 460 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?
There are 150 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 890 cents. How many 7-cent stamps are there?
There are 230 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1470 cents. How many 5-cent stamps are there?
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