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There are 190 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1050 cents. How many 7-cent stamps are there?
There are 260 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 1200 cents. How many 6-cent stamps are there?
There are 210 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1380 cents. How many 8-cent stamps are there?
There are 210 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1140 cents. How many 6-cent stamps are there?
There are 150 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 870 cents. How many 5-cent stamps are there?
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There are 250 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 1110 cents. How many 6-cent stamps are there?
There are 140 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 980 cents. How many 5-cent stamps are there?
오늘 8원짜리 9원짜리 우표 총 200 장을 사고, 1700 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?
There are 170 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1420 cents. How many 8-cent stamps are there?
There are 210 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1070 cents. How many 3-cent stamps are there?
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