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There are 200 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1530 cents. How many 7-cent stamps are there?
There are 230 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1340 cents. How many 7-cent stamps are there?
There are 200 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1400 cents. How many 8-cent stamps are there?
There are 200 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1200 cents. How many 7-cent stamps are there?
There are 260 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1720 cents. How many 8-cent stamps are there?
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There are 260 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 1190 cents. How many 5-cent stamps are there?
There are 130 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1030 cents. How many 7-cent stamps are there?
오늘 7원짜리 6원짜리 우표 총 220 장을 사고, 1430 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?
There are 200 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1200 cents. How many 7-cent stamps are there?
There are 160 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1100 cents. How many 8-cent stamps are there?
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