388  Stamp
How many stamps? 2

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There are 210 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1380 cents. How many 6-cent stamps are there?



There are 230 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1770 cents. How many 7-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 880 cents. How many 7-cent stamps are there?



There are 200 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1040 cents. How many 6-cent stamps are there?



There are 180 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 930 cents. How many 7-cent stamps are there?



There are 180 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 660 cents. How many 4-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?



오늘 6원짜리 8원짜리 우표 총 200 장을 사고, 1440 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 130 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 590 cents. How many 5-cent stamps are there?



There are 180 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 960 cents. How many 7-cent stamps are there?



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388    90 150 70 120 70 ( 500 )   120 130 80 70 80 ( 480 )   [[ 980 ]]