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There are 190 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 850 cents. How many 5-cent stamps are there?
There are 180 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 620 cents. How many 4-cent stamps are there?
There are 250 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 900 cents. How many 4-cent stamps are there?
There are 200 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1480 cents. How many 5-cent stamps are there?
There are 250 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1390 cents. How many 6-cent stamps are there?
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There are 160 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 980 cents. How many 5-cent stamps are there?
There are 210 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1690 cents. How many 7-cent stamps are there?
오늘 4원짜리 5원짜리 우표 총 150 장을 사고, 650 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?
There are 160 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 880 cents. How many 3-cent stamps are there?
There are 260 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1700 cents. How many 7-cent stamps are there?
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