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There are 210 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1250 cents. How many 5-cent stamps are there?
There are 190 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 860 cents. How many 4-cent stamps are there?
There are 240 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1530 cents. How many 6-cent stamps are there?
There are 220 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1160 cents. How many 4-cent stamps are there?
There are 170 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1140 cents. How many 6-cent stamps are there?
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There are 170 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 720 cents. How many 6-cent stamps are there?
There are 170 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 800 cents. How many 4-cent stamps are there?
오늘 5원짜리 6원짜리 우표 총 160 장을 사고, 890 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?
There are 220 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1200 cents. How many 6-cent stamps are there?
There are 190 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1060 cents. How many 6-cent stamps are there?
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