262  Stamp
How many stamps? 2

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There are 120 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 640 cents. How many 7-cent stamps are there?



There are 230 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1140 cents. How many 3-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1500 cents. How many 8-cent stamps are there?



There are 150 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1040 cents. How many 8-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1160 cents. How many 8-cent stamps are there?



There are 170 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 840 cents. How many 4-cent stamps are there?



There are 230 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1300 cents. How many 6-cent stamps are there?



오늘 6원짜리 8원짜리 우표 총 280 장을 사고, 1940 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 190 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 940 cents. How many 4-cent stamps are there?



There are 140 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 800 cents. How many 7-cent stamps are there?



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262    70 140 150 70 70 ( 500 )   90 150 150 100 80 ( 570 )   [[ 1070 ]]