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There are 190 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 810 cents. How many 5-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 190 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1220 cents. How many 6-cent stamps are there?
There are 280 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1790 cents. How many 5-cent stamps are there?
There are 170 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 780 cents. How many 5-cent stamps are there?
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There are 160 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 700 cents. How many 5-cent stamps are there?
There are 200 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1080 cents. How many 7-cent stamps are there?
오늘 5원짜리 9원짜리 우표 총 120 장을 사고, 800 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?
There are 190 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1190 cents. How many 7-cent stamps are there?
There are 210 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1280 cents. How many 4-cent stamps are there?
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