280  Stamp
How many stamps? 2

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There are 170 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1130 cents. How many 4-cent stamps are there?



There are 210 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1480 cents. How many 6-cent stamps are there?



There are 200 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 720 cents. How many 3-cent stamps are there?



There are 190 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1050 cents. How many 6-cent stamps are there?



There are 180 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1300 cents. How many 8-cent stamps are there?



There are 250 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 1140 cents. How many 6-cent stamps are there?



There are 150 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1060 cents. How many 8-cent stamps are there?



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There are 250 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1350 cents. How many 8-cent stamps are there?



There are 120 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 740 cents. How many 7-cent stamps are there?



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280    80 100 140 100 110 ( 530 )   130 80 130 120 70 ( 530 )   [[ 1060 ]]