544  Stamp
How many stamps? 2

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There are 220 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1640 cents. How many 8-cent stamps are there?



There are 170 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1250 cents. How many 5-cent stamps are there?



There are 140 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 830 cents. How many 7-cent stamps are there?



There are 220 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1720 cents. How many 7-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 790 cents. How many 5-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1020 cents. How many 4-cent stamps are there?



There are 160 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1020 cents. How many 6-cent stamps are there?



오늘 5원짜리 4원짜리 우표 총 210 장을 사고, 920 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?



There are 170 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1090 cents. How many 8-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1170 cents. How many 5-cent stamps are there?



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544    100 70 90 130 80 ( 470 )   90 100 80 80 90 ( 440 )   [[ 910 ]]