915  Stamp
How many stamps? 2

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There are 170 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1030 cents. How many 5-cent stamps are there?



There are 230 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 1040 cents. How many 5-cent stamps are there?



There are 260 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1580 cents. How many 7-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1100 cents. How many 4-cent stamps are there?



There are 210 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 810 cents. How many 3-cent stamps are there?



There are 140 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1080 cents. How many 7-cent stamps are there?



There are 170 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 590 cents. How many 4-cent stamps are there?



오늘 3원짜리 4원짜리 우표 총 170 장을 사고, 570 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?



There are 190 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 930 cents. How many 7-cent stamps are there?



There are 160 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1000 cents. How many 7-cent stamps are there?



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915    110 120 140 140 120 ( 630 )   90 80 110 90 100 ( 470 )   [[ 1100 ]]