744  Stamp
How many stamps? 2

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There are 200 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1120 cents. How many 4-cent stamps are there?



There are 220 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1180 cents. How many 7-cent stamps are there?



There are 220 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1660 cents. How many 7-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1120 cents. How many 8-cent stamps are there?



There are 120 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 510 cents. How many 3-cent stamps are there?



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



There are 200 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1480 cents. How many 7-cent stamps are there?



오늘 7원짜리 6원짜리 우표 총 170 장을 사고, 1090 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 230 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1720 cents. How many 8-cent stamps are there?



There are 180 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 720 cents. How many 3-cent stamps are there?



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744    120 100 100 110 70 ( 500 )   70 120 70 110 90 ( 460 )   [[ 960 ]]