168  Stamp
How many stamps? 2

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There are 190 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1400 cents. How many 8-cent stamps are there?



There are 260 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1970 cents. How many 8-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1080 cents. How many 8-cent stamps are there?



There are 260 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1260 cents. How many 3-cent stamps are there?



There are 170 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1090 cents. How many 7-cent stamps are there?



There are 250 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 970 cents. How many 3-cent stamps are there?



There are 120 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 770 cents. How many 6-cent stamps are there?



오늘 5원짜리 8원짜리 우표 총 150 장을 사고, 930 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?



There are 280 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1420 cents. How many 6-cent stamps are there?



There are 230 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1760 cents. How many 8-cent stamps are there?



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168    70 150 70 140 120 ( 550 )   140 70 90 150 150 ( 600 )   [[ 1150 ]]