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There are 210 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 930 cents. How many 3-cent stamps are there?
There are 180 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1340 cents. How many 5-cent stamps are there?
There are 200 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1090 cents. How many 6-cent stamps are there?
There are 260 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1430 cents. How many 7-cent stamps are there?
There are 260 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1660 cents. How many 5-cent stamps are there?
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There are 200 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1680 cents. How many 8-cent stamps are there?
There are 170 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 790 cents. How many 5-cent stamps are there?
오늘 8원짜리 7원짜리 우표 총 230 장을 사고, 1750 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?
There are 210 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1040 cents. How many 6-cent stamps are there?
There are 160 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1080 cents. How many 8-cent stamps are there?
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