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There are 140 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 770 cents. How many 8-cent stamps are there?
There are 250 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1330 cents. How many 4-cent stamps are there?
There are 230 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 1000 cents. How many 4-cent stamps are there?
There are 230 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1190 cents. How many 8-cent stamps are there?
There are 260 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1260 cents. How many 3-cent stamps are there?
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There are 170 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 870 cents. How many 3-cent stamps are there?
There are 170 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 660 cents. How many 3-cent stamps are there?
오늘 4원짜리 6원짜리 우표 총 140 장을 사고, 700 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?
There are 250 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1350 cents. How many 3-cent stamps are there?
There are 210 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1620 cents. How many 8-cent stamps are there?
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