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There are 160 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 860 cents. How many 6-cent stamps are there?
There are 180 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 720 cents. How many 3-cent stamps are there?
There are 280 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1440 cents. How many 7-cent stamps are there?
There are 240 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 2020 cents. How many 8-cent stamps are there?
There are 210 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 760 cents. How many 4-cent stamps are there?
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There are 190 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 930 cents. How many 3-cent stamps are there?
There are 200 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1190 cents. How many 7-cent stamps are there?
오늘 7원짜리 8원짜리 우표 총 230 장을 사고, 1690 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?
There are 240 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1540 cents. How many 6-cent stamps are there?
There are 200 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1110 cents. How many 6-cent stamps are there?
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