316  Stamp
How many stamps? 2

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There are 170 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1050 cents. How many 3-cent stamps are there?



There are 150 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 950 cents. How many 4-cent stamps are there?



There are 150 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 930 cents. How many 5-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1290 cents. How many 5-cent stamps are there?



There are 210 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 910 cents. How many 4-cent stamps are there?



There are 260 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 1080 cents. How many 5-cent stamps are there?



There are 220 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1560 cents. How many 6-cent stamps are there?



오늘 7원짜리 6원짜리 우표 총 200 장을 사고, 1300 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 170 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 810 cents. How many 6-cent stamps are there?



There are 140 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1070 cents. How many 8-cent stamps are there?



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316    80 80 90 130 140 ( 520 )   150 140 100 100 90 ( 580 )   [[ 1100 ]]