912  Stamp
How many stamps? 2

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There are 270 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1640 cents. How many 8-cent stamps are there?



There are 260 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 920 cents. How many 4-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1240 cents. How many 4-cent stamps are there?



There are 260 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1780 cents. How many 6-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1200 cents. How many 8-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1160 cents. How many 7-cent stamps are there?



There are 190 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1030 cents. How many 4-cent stamps are there?



오늘 4원짜리 8원짜리 우표 총 140 장을 사고, 840 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 140 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 900 cents. How many 6-cent stamps are there?



There are 190 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1130 cents. How many 7-cent stamps are there?



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912    140 140 90 150 90 ( 610 )   120 100 70 80 90 ( 460 )   [[ 1070 ]]