289  Stamp
How many stamps? 2

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There are 150 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1040 cents. How many 6-cent stamps are there?



There are 140 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 540 cents. How many 3-cent stamps are there?



There are 180 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 900 cents. How many 3-cent stamps are there?



There are 180 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 820 cents. How many 7-cent stamps are there?



There are 160 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 920 cents. How many 7-cent stamps are there?



There are 190 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 690 cents. How many 3-cent stamps are there?



There are 230 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1290 cents. How many 3-cent stamps are there?



오늘 8원짜리 4원짜리 우표 총 230 장을 사고, 1520 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?



There are 210 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 740 cents. How many 3-cent stamps are there?



There are 240 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1660 cents. How many 8-cent stamps are there?



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289    80 80 120 70 110 ( 460 )   70 110 150 100 110 ( 540 )   [[ 1000 ]]