604  Stamp
How many stamps? 2

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There are 230 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1290 cents. How many 3-cent stamps are there?



There are 190 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1320 cents. How many 8-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1100 cents. How many 7-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 860 cents. How many 5-cent stamps are there?



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



There are 160 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 840 cents. How many 4-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1120 cents. How many 8-cent stamps are there?



오늘 7원짜리 3원짜리 우표 총 270 장을 사고, 1410 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 190 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1220 cents. How many 5-cent stamps are there?



There are 130 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 960 cents. How many 7-cent stamps are there?



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604    130 140 100 100 130 ( 600 )   110 90 150 100 80 ( 530 )   [[ 1130 ]]