764  Stamp
How many stamps? 2

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There are 180 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1140 cents. How many 7-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1580 cents. How many 5-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1520 cents. How many 8-cent stamps are there?



There are 170 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 920 cents. How many 5-cent stamps are there?



There are 240 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1700 cents. How many 6-cent stamps are there?



There are 220 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1380 cents. How many 4-cent stamps are there?



There are 200 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1240 cents. How many 5-cent stamps are there?



오늘 3원짜리 6원짜리 우표 총 210 장을 사고, 960 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?



There are 170 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 620 cents. How many 4-cent stamps are there?



There are 260 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1590 cents. How many 4-cent stamps are there?



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764    120 100 120 100 110 ( 550 )   120 80 100 110 150 ( 560 )   [[ 1110 ]]