281  Stamp
How many stamps? 2

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There are 250 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1300 cents. How many 4-cent stamps are there?



There are 170 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 780 cents. How many 4-cent stamps are there?



There are 250 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1510 cents. How many 5-cent stamps are there?



There are 220 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1440 cents. How many 7-cent stamps are there?



There are 190 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 920 cents. How many 8-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1410 cents. How many 7-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 940 cents. How many 5-cent stamps are there?



오늘 6원짜리 4원짜리 우표 총 150 장을 사고, 740 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 190 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1080 cents. How many 8-cent stamps are there?



There are 200 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1440 cents. How many 6-cent stamps are there?



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281    150 120 120 120 70 ( 580 )   150 140 70 80 120 ( 560 )   [[ 1140 ]]