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There are 220 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1530 cents. How many 4-cent stamps are there?
There are 240 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1560 cents. How many 6-cent stamps are there?
There are 150 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 590 cents. How many 5-cent stamps are there?
There are 180 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1090 cents. How many 3-cent stamps are there?
There are 210 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 930 cents. How many 4-cent stamps are there?
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There are 220 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1890 cents. How many 8-cent stamps are there?
There are 180 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 820 cents. How many 4-cent stamps are there?
오늘 4원짜리 6원짜리 우표 총 250 장을 사고, 1240 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?
There are 220 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1310 cents. How many 5-cent stamps are there?
There are 230 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1470 cents. How many 4-cent stamps are there?
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