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There are 180 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 770 cents. How many 4-cent stamps are there?
There are 220 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1620 cents. How many 7-cent stamps are there?
There are 200 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1070 cents. How many 7-cent stamps are there?
There are 250 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1380 cents. How many 6-cent stamps are there?
There are 200 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 900 cents. How many 3-cent stamps are there?
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There are 220 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1440 cents. How many 6-cent stamps are there?
There are 150 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 670 cents. How many 4-cent stamps are there?
오늘 3원짜리 7원짜리 우표 총 250 장을 사고, 1190 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?
There are 160 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 980 cents. How many 7-cent stamps are there?
There are 250 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1620 cents. How many 7-cent stamps are there?
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