157  Stamp
How many stamps? 2

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There are 260 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1740 cents. How many 5-cent stamps are there?



There are 150 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 810 cents. How many 5-cent stamps are there?



There are 130 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 640 cents. How many 3-cent stamps are there?



There are 180 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 860 cents. How many 4-cent stamps are there?



There are 220 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1760 cents. How many 7-cent stamps are there?



There are 230 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1320 cents. How many 4-cent stamps are there?



There are 150 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1080 cents. How many 6-cent stamps are there?



오늘 6원짜리 3원짜리 우표 총 120 장을 사고, 570 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 150 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1000 cents. How many 7-cent stamps are there?



There are 160 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1180 cents. How many 7-cent stamps are there?



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157    150 90 80 110 110 ( 540 )   150 90 70 100 100 ( 510 )   [[ 1050 ]]