878  Stamp
How many stamps? 2

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There are 190 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1050 cents. How many 5-cent stamps are there?



There are 210 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1060 cents. How many 6-cent stamps are there?



There are 180 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 960 cents. How many 6-cent stamps are there?



There are 250 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 870 cents. How many 4-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1540 cents. How many 5-cent stamps are there?



There are 210 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1440 cents. How many 4-cent stamps are there?



There are 180 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 800 cents. How many 5-cent stamps are there?



오늘 4원짜리 6원짜리 우표 총 190 장을 사고, 920 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 260 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 1040 cents. How many 5-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 960 cents. How many 8-cent stamps are there?



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878    140 110 120 120 110 ( 600 )   90 130 110 130 70 ( 530 )   [[ 1130 ]]