537  Stamp
How many stamps? 2

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There are 210 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1490 cents. How many 5-cent stamps are there?



There are 160 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1010 cents. How many 8-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1620 cents. How many 5-cent stamps are there?



There are 220 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1460 cents. How many 8-cent stamps are there?



There are 200 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 840 cents. How many 3-cent stamps are there?



There are 190 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1120 cents. How many 8-cent stamps are there?



There are 240 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 1070 cents. How many 5-cent stamps are there?



오늘 8원짜리 9원짜리 우표 총 140 장을 사고, 1170 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?



There are 150 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 520 cents. How many 3-cent stamps are there?



There are 200 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 820 cents. How many 3-cent stamps are there?



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537    100 70 90 120 80 ( 460 )   90 110 90 80 90 ( 460 )   [[ 920 ]]