788  Stamp
How many stamps? 2

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There are 150 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 900 cents. How many 5-cent stamps are there?



There are 180 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 860 cents. How many 7-cent stamps are there?



There are 140 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 780 cents. How many 7-cent stamps are there?



There are 230 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1180 cents. How many 6-cent stamps are there?



There are 220 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1580 cents. How many 6-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 810 cents. How many 5-cent stamps are there?



There are 170 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 950 cents. How many 7-cent stamps are there?



오늘 6원짜리 4원짜리 우표 총 260 장을 사고, 1340 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 160 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 860 cents. How many 5-cent stamps are there?



There are 160 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 720 cents. How many 5-cent stamps are there?



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788    100 80 90 130 90 ( 490 )   90 110 150 100 80 ( 530 )   [[ 1020 ]]