250  Stamp
How many stamps? 2

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There are 120 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 670 cents. How many 6-cent stamps are there?



There are 240 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 1140 cents. How many 6-cent stamps are there?



There are 210 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1050 cents. How many 4-cent stamps are there?



There are 270 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1590 cents. How many 3-cent stamps are there?



There are 190 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 990 cents. How many 6-cent stamps are there?



There are 150 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 760 cents. How many 4-cent stamps are there?



There are 240 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 1090 cents. How many 4-cent stamps are there?



오늘 3원짜리 6원짜리 우표 총 220 장을 사고, 870 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?



There are 240 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1880 cents. How many 7-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1740 cents. How many 8-cent stamps are there?



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250    70 140 140 140 140 ( 630 )   70 110 150 140 150 ( 620 )   [[ 1250 ]]