480  Stamp
How many stamps? 2

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There are 230 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1710 cents. How many 8-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1320 cents. How many 7-cent stamps are there?



There are 210 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1380 cents. How many 6-cent stamps are there?



There are 160 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 880 cents. How many 8-cent stamps are there?



There are 190 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 840 cents. How many 5-cent stamps are there?



There are 220 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1270 cents. How many 7-cent stamps are there?



There are 230 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1640 cents. How many 6-cent stamps are there?



오늘 6�짜리 9�짜리 우표 � 190 장� 사고, 1440 �� 지불 했�때, 몇개� 6�짜리 우표를 샀는가?



There are 260 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1720 cents. How many 8-cent stamps are there?



There are 150 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1130 cents. How many 8-cent stamps are there?



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480    100 120 90 80 80 ( 470 )   130 100 90 140 80 ( 540 )   [[ 1010 ]]