391  Stamp
How many stamps? 2

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There are 160 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1070 cents. How many 8-cent stamps are there?



There are 180 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1230 cents. How many 5-cent stamps are there?



There are 140 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 780 cents. How many 6-cent stamps are there?



There are 230 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1590 cents. How many 5-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1160 cents. How many 8-cent stamps are there?



There are 250 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1400 cents. How many 8-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1750 cents. How many 8-cent stamps are there?



오늘 5원짜리 8원짜리 우표 총 180 장을 사고, 1200 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?



There are 160 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1020 cents. How many 3-cent stamps are there?



There are 130 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 670 cents. How many 4-cent stamps are there?



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391    90 70 80 120 120 ( 480 )   130 140 80 70 80 ( 500 )   [[ 980 ]]