591  Stamp
How many stamps? 2

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There are 200 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1580 cents. How many 7-cent stamps are there?



There are 130 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 890 cents. How many 8-cent stamps are there?



There are 180 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 800 cents. How many 4-cent stamps are there?



There are 190 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1270 cents. How many 8-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1280 cents. How many 8-cent stamps are there?



There are 150 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1000 cents. How many 8-cent stamps are there?



There are 180 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 670 cents. How many 4-cent stamps are there?



오늘 3원짜리 5원짜리 우표 총 190 장을 사고, 730 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?



There are 210 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1380 cents. How many 6-cent stamps are there?



There are 170 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 980 cents. How many 7-cent stamps are there?



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591    110 80 100 140 90 ( 520 )   100 130 110 90 100 ( 530 )   [[ 1050 ]]