754  Stamp
How many stamps? 2

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There are 190 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 830 cents. How many 4-cent stamps are there?



There are 260 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1370 cents. How many 4-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1300 cents. How many 8-cent stamps are there?



There are 220 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1430 cents. How many 4-cent stamps are there?



There are 160 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1230 cents. How many 8-cent stamps are there?



There are 240 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1200 cents. How many 7-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1150 cents. How many 7-cent stamps are there?



오늘 4원짜리 3원짜리 우표 총 240 장을 사고, 840 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 220 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1180 cents. How many 5-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1260 cents. How many 7-cent stamps are there?



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754    120 150 110 110 110 ( 600 )   120 130 120 140 140 ( 650 )   [[ 1250 ]]