390  Stamp
How many stamps? 2

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There are 170 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1440 cents. How many 8-cent stamps are there?



There are 240 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1160 cents. How many 7-cent stamps are there?



There are 200 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 900 cents. How many 3-cent stamps are there?



There are 140 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 490 cents. How many 4-cent stamps are there?



There are 130 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 720 cents. How many 4-cent stamps are there?



There are 230 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1660 cents. How many 8-cent stamps are there?



There are 140 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 740 cents. How many 6-cent stamps are there?



오늘 5원짜리 9원짜리 우표 총 170 장을 사고, 1170 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?



There are 210 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1060 cents. How many 4-cent stamps are there?



There are 190 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 830 cents. How many 5-cent stamps are there?



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390    90 110 140 70 80 ( 490 )   140 90 90 100 70 ( 490 )   [[ 980 ]]