320  Stamp
How many stamps? 2

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There are 160 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 960 cents. How many 7-cent stamps are there?



There are 270 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1320 cents. How many 4-cent stamps are there?



There are 210 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1390 cents. How many 4-cent stamps are there?



There are 130 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 630 cents. How many 3-cent stamps are there?



There are 220 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1160 cents. How many 6-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1440 cents. How many 8-cent stamps are there?



There are 190 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1220 cents. How many 5-cent stamps are there?



오늘 3원짜리 8원짜리 우표 총 210 장을 사고, 1180 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?



There are 190 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 940 cents. How many 4-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1300 cents. How many 8-cent stamps are there?



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320    80 150 100 70 140 ( 540 )   130 100 100 130 100 ( 560 )   [[ 1100 ]]