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There are 170 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1090 cents. How many 5-cent stamps are there?
There are 220 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1890 cents. How many 8-cent stamps are there?
There are 210 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1440 cents. How many 6-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 220 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1090 cents. How many 4-cent stamps are there?
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There are 240 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1220 cents. How many 6-cent stamps are there?
There are 210 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1190 cents. How many 6-cent stamps are there?
오늘 7원짜리 6원짜리 우표 총 200 장을 사고, 1310 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?
There are 270 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1590 cents. How many 5-cent stamps are there?
There are 150 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 820 cents. How many 6-cent stamps are there?
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