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There are 230 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1580 cents. How many 6-cent stamps are there?
There are 210 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1170 cents. How many 5-cent stamps are there?
There are 170 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 920 cents. How many 6-cent stamps are there?
There are 170 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 960 cents. How many 6-cent stamps are there?
There are 160 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 870 cents. How many 6-cent stamps are there?
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There are 190 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1380 cents. How many 8-cent stamps are there?
There are 200 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1320 cents. How many 6-cent stamps are there?
오늘 7원짜리 3원짜리 우표 총 160 장을 사고, 800 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?
There are 230 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1090 cents. How many 3-cent stamps are there?
There are 200 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 850 cents. How many 3-cent stamps are there?
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