724  Stamp
How many stamps? 2

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There are 190 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1110 cents. How many 4-cent stamps are there?



There are 190 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1090 cents. How many 5-cent stamps are there?



There are 240 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1330 cents. How many 6-cent stamps are there?



There are 270 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1860 cents. How many 6-cent stamps are there?



There are 230 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1480 cents. How many 6-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1420 cents. How many 5-cent stamps are there?



There are 160 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 800 cents. How many 4-cent stamps are there?



오늘 7원짜리 6원짜리 우표 총 210 장을 사고, 1340 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 210 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1130 cents. How many 8-cent stamps are there?



There are 140 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1020 cents. How many 6-cent stamps are there?



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724    120 120 130 150 130 ( 650 )   140 80 80 100 80 ( 480 )   [[ 1130 ]]