678  Stamp
How many stamps? 2

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There are 250 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1360 cents. How many 7-cent stamps are there?



There are 230 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1650 cents. How many 6-cent stamps are there?



There are 280 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 2090 cents. How many 7-cent stamps are there?



There are 140 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 720 cents. How many 3-cent stamps are there?



There are 230 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1250 cents. How many 6-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1150 cents. How many 5-cent stamps are there?



There are 190 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1570 cents. How many 7-cent stamps are there?



오늘 5원짜리 8원짜리 우표 총 210 장을 사고, 1260 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?



There are 180 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 970 cents. How many 6-cent stamps are there?



There are 220 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1410 cents. How many 8-cent stamps are there?



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678    120 140 150 80 100 ( 590 )   110 70 140 70 150 ( 540 )   [[ 1130 ]]