156  Stamp
How many stamps? 2

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There are 270 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 2130 cents. How many 7-cent stamps are there?



There are 190 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 930 cents. How many 3-cent stamps are there?



There are 140 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 820 cents. How many 5-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1400 cents. How many 8-cent stamps are there?



There are 170 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 990 cents. How many 7-cent stamps are there?



There are 250 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1380 cents. How many 6-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1080 cents. How many 8-cent stamps are there?



오늘 5원짜리 4원짜리 우표 총 210 장을 사고, 950 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?



There are 180 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1180 cents. How many 6-cent stamps are there?



There are 200 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1140 cents. How many 6-cent stamps are there?



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156    150 70 80 140 120 ( 560 )   130 100 110 130 140 ( 610 )   [[ 1170 ]]