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There are 160 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1120 cents. How many 5-cent stamps are there?
There are 270 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1800 cents. How many 8-cent stamps are there?
There are 200 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1040 cents. How many 6-cent stamps are there?
There are 240 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1560 cents. How many 8-cent stamps are there?
There are 130 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1100 cents. How many 8-cent stamps are there?
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There are 250 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1240 cents. How many 6-cent stamps are there?
There are 220 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1280 cents. How many 5-cent stamps are there?
오늘 8원짜리 7원짜리 우표 총 180 장을 사고, 1390 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?
There are 200 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1300 cents. How many 6-cent stamps are there?
There are 140 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 880 cents. How many 8-cent stamps are there?
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