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There are 160 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 800 cents. How many 3-cent stamps are there?
There are 190 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1450 cents. How many 7-cent stamps are there?
There are 140 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1120 cents. How many 7-cent stamps are there?
There are 180 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 660 cents. How many 4-cent stamps are there?
There are 270 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 1070 cents. How many 3-cent stamps are there?
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There are 240 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 1020 cents. How many 5-cent stamps are there?
There are 160 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 840 cents. How many 7-cent stamps are there?
오늘 5원짜리 3원짜리 우표 총 180 장을 사고, 680 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?
There are 180 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 840 cents. How many 3-cent stamps are there?
There are 180 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1000 cents. How many 8-cent stamps are there?
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