487  Stamp
How many stamps? 2

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There are 200 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1100 cents. How many 3-cent stamps are there?



There are 230 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1370 cents. How many 5-cent stamps are there?



There are 190 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 700 cents. How many 4-cent stamps are there?



There are 160 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1040 cents. How many 5-cent stamps are there?



There are 150 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 540 cents. How many 4-cent stamps are there?



There are 200 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1000 cents. How many 6-cent stamps are there?



There are 210 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 910 cents. How many 3-cent stamps are there?



오늘 4원짜리 6원짜리 우표 총 190 장을 사고, 960 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 210 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1280 cents. How many 3-cent stamps are there?



There are 170 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 990 cents. How many 3-cent stamps are there?



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487    100 120 130 80 90 ( 520 )   100 140 90 80 90 ( 500 )   [[ 1020 ]]