284  Stamp
How many stamps? 2

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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 260 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1920 cents. How many 6-cent stamps are there?



There are 230 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1770 cents. How many 7-cent stamps are there?



There are 240 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 1050 cents. How many 6-cent stamps are there?



There are 220 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1390 cents. How many 6-cent stamps are there?



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 160 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1120 cents. How many 8-cent stamps are there?



오늘 6원짜리 5원짜리 우표 총 170 장을 사고, 970 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 140 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 770 cents. How many 7-cent stamps are there?



There are 250 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1450 cents. How many 5-cent stamps are there?



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284    80 140 150 110 150 ( 630 )   70 80 120 70 150 ( 490 )   [[ 1120 ]]