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There are 120 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 820 cents. How many 6-cent stamps are there?
There are 230 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 830 cents. How many 4-cent stamps are there?
There are 170 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 840 cents. How many 4-cent stamps are there?
There are 130 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 550 cents. How many 5-cent stamps are there?
There are 200 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 990 cents. How many 6-cent stamps are there?
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There are 170 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 580 cents. How many 4-cent stamps are there?
There are 240 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1640 cents. How many 6-cent stamps are there?
오늘 3원짜리 4원짜리 우표 총 220 장을 사고, 760 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?
There are 250 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1360 cents. How many 7-cent stamps are there?
There are 240 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 840 cents. How many 4-cent stamps are there?
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