268  Stamp
How many stamps? 2

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There are 160 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1210 cents. How many 7-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 840 cents. How many 5-cent stamps are there?



There are 240 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1530 cents. How many 6-cent stamps are there?



There are 230 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1670 cents. How many 5-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1150 cents. How many 5-cent stamps are there?



There are 260 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1430 cents. How many 3-cent stamps are there?



There are 210 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1340 cents. How many 6-cent stamps are there?



오늘 7원짜리 8원짜리 우표 총 230 장을 사고, 1720 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 230 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1010 cents. How many 3-cent stamps are there?



There are 180 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1100 cents. How many 5-cent stamps are there?



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268    70 90 150 100 110 ( 520 )   130 130 120 150 130 ( 660 )   [[ 1180 ]]