387  Stamp
How many stamps? 2

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There are 170 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1170 cents. How many 5-cent stamps are there?



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



There are 190 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1020 cents. How many 5-cent stamps are there?



There are 190 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1000 cents. How many 4-cent stamps are there?



There are 180 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 960 cents. How many 5-cent stamps are there?



There are 250 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1470 cents. How many 3-cent stamps are there?



There are 160 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1090 cents. How many 4-cent stamps are there?



오늘 6원짜리 7원짜리 우표 총 170 장을 사고, 1120 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 190 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 820 cents. How many 4-cent stamps are there?



There are 190 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1120 cents. How many 3-cent stamps are there?



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387    90 110 120 70 120 ( 510 )   130 70 70 130 80 ( 480 )   [[ 990 ]]