497  Stamp
How many stamps? 2

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There are 150 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 550 cents. How many 3-cent stamps are there?



There are 230 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1280 cents. How many 5-cent stamps are there?



There are 190 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1380 cents. How many 6-cent stamps are there?



There are 200 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1050 cents. How many 5-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1350 cents. How many 7-cent stamps are there?



There are 120 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 910 cents. How many 8-cent stamps are there?



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?



오늘 4원짜리 9원짜리 우표 총 140 장을 사고, 860 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 270 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1590 cents. How many 3-cent stamps are there?



There are 220 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1280 cents. How many 8-cent stamps are there?



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497    100 100 110 150 90 ( 550 )   70 100 80 140 100 ( 490 )   [[ 1040 ]]