401  Stamp
How many stamps? 2

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There are 160 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1140 cents. How many 8-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1420 cents. How many 8-cent stamps are there?



There are 270 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1530 cents. How many 7-cent stamps are there?



There are 190 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1530 cents. How many 7-cent stamps are there?



There are 250 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1550 cents. How many 7-cent stamps are there?



There are 250 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1800 cents. How many 8-cent stamps are there?



There are 210 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 760 cents. How many 4-cent stamps are there?



오늘 6원짜리 9원짜리 우표 총 260 장을 사고, 1890 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 180 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1320 cents. How many 6-cent stamps are there?



There are 230 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1460 cents. How many 6-cent stamps are there?



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401    90 140 150 90 150 ( 620 )   150 130 150 100 150 ( 680 )   [[ 1300 ]]