771  Stamp
How many stamps? 2

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There are 250 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 2010 cents. How many 7-cent stamps are there?



There are 200 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1560 cents. How many 6-cent stamps are there?



There are 240 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1560 cents. How many 6-cent stamps are there?



There are 150 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 590 cents. How many 5-cent stamps are there?



There are 210 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 700 cents. How many 3-cent stamps are there?



There are 150 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 800 cents. How many 6-cent stamps are there?



There are 240 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 870 cents. How many 4-cent stamps are there?



오늘 4원짜리 5원짜리 우표 총 180 장을 사고, 820 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 200 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1360 cents. How many 8-cent stamps are there?



There are 180 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 610 cents. How many 3-cent stamps are there?



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771    120 80 120 70 140 ( 530 )   100 150 80 80 110 ( 520 )   [[ 1050 ]]