694  Stamp
How many stamps? 2

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There are 230 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1830 cents. How many 7-cent stamps are there?



There are 210 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1400 cents. How many 6-cent stamps are there?



There are 260 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1710 cents. How many 7-cent stamps are there?



There are 220 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1010 cents. How many 3-cent stamps are there?



There are 200 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1200 cents. How many 3-cent stamps are there?



There are 190 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 810 cents. How many 3-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1120 cents. How many 8-cent stamps are there?



오늘 3원짜리 7원짜리 우표 총 150 장을 사고, 770 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?



There are 180 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1480 cents. How many 7-cent stamps are there?



There are 150 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1150 cents. How many 8-cent stamps are there?



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694    120 140 150 150 100 ( 660 )   110 80 70 70 100 ( 430 )   [[ 1090 ]]