424  Stamp
How many stamps? 2

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There are 200 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 980 cents. How many 6-cent stamps are there?



There are 190 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1220 cents. How many 8-cent stamps are there?



There are 200 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1360 cents. How many 6-cent stamps are there?



There are 170 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1290 cents. How many 7-cent stamps are there?



There are 170 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 750 cents. How many 6-cent stamps are there?



There are 220 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1670 cents. How many 7-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1190 cents. How many 5-cent stamps are there?



오늘 8원짜리 9원짜리 우표 총 160 장을 사고, 1350 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?



There are 180 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 960 cents. How many 7-cent stamps are there?



There are 240 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1590 cents. How many 5-cent stamps are there?



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424    90 130 120 70 80 ( 490 )   90 130 90 80 110 ( 500 )   [[ 990 ]]