275  Stamp
How many stamps? 2

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There are 180 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 650 cents. How many 3-cent stamps are there?



There are 180 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1260 cents. How many 8-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 230 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 1080 cents. How many 3-cent stamps are there?



There are 180 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 840 cents. How many 5-cent stamps are there?



There are 280 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1830 cents. How many 7-cent stamps are there?



There are 270 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1440 cents. How many 4-cent stamps are there?



오늘 8원짜리 7원짜리 우표 총 220 장을 사고, 1680 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?



There are 190 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1180 cents. How many 7-cent stamps are there?



There are 130 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 460 cents. How many 4-cent stamps are there?



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275    70 120 140 100 120 ( 550 )   150 150 140 140 70 ( 650 )   [[ 1200 ]]