904  Stamp
How many stamps? 2

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There are 250 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1860 cents. How many 7-cent stamps are there?



There are 220 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1060 cents. How many 6-cent stamps are there?



There are 150 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 800 cents. How many 3-cent stamps are there?



There are 170 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1100 cents. How many 7-cent stamps are there?



There are 160 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1050 cents. How many 7-cent stamps are there?



There are 260 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 1180 cents. How many 5-cent stamps are there?



There are 170 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 990 cents. How many 3-cent stamps are there?



오늘 6원짜리 3원짜리 우표 총 170 장을 사고, 720 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 180 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1000 cents. How many 5-cent stamps are there?



There are 270 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1680 cents. How many 4-cent stamps are there?



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904    140 90 80 80 90 ( 480 )   140 90 70 130 150 ( 580 )   [[ 1060 ]]