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There are 200 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1330 cents. How many 6-cent stamps are there?
There are 130 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 700 cents. How many 4-cent stamps are there?
There are 230 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1690 cents. How many 7-cent stamps are there?
There are 220 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1440 cents. How many 6-cent stamps are there?
There are 210 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1600 cents. How many 8-cent stamps are there?
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There are 230 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1370 cents. How many 7-cent stamps are there?
There are 160 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 830 cents. How many 3-cent stamps are there?
오늘 8원짜리 3원짜리 우표 총 260 장을 사고, 1530 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?
There are 180 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1340 cents. How many 7-cent stamps are there?
There are 130 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 640 cents. How many 3-cent stamps are there?
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