304  Stamp
How many stamps? 2

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There are 150 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 840 cents. How many 4-cent stamps are there?



There are 180 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 870 cents. How many 6-cent stamps are there?



There are 200 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 950 cents. How many 5-cent stamps are there?



There are 140 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 660 cents. How many 6-cent stamps are there?



There are 240 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 960 cents. How many 5-cent stamps are there?



There are 140 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 640 cents. How many 5-cent stamps are there?



There are 240 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1320 cents. How many 4-cent stamps are there?



오늘 4원짜리 8원짜리 우표 총 120 장을 사고, 680 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 220 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 860 cents. How many 5-cent stamps are there?



There are 180 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 870 cents. How many 3-cent stamps are there?



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304    90 110 150 80 120 ( 550 )   80 150 70 100 70 ( 470 )   [[ 1020 ]]