641  Stamp
How many stamps? 1

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There are 220 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1650 cents. How many 7-cent stamps are there?



There are 180 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1090 cents. How many 3-cent stamps are there?



There are 240 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1200 cents. How many 6-cent stamps are there?



There are 130 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 730 cents. How many 7-cent stamps are there?



There are 140 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 720 cents. How many 6-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1180 cents. How many 5-cent stamps are there?



There are 150 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 720 cents. How many 4-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1210 cents. How many 8-cent stamps are there?



There are 190 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 690 cents. How many 3-cent stamps are there?



There are 180 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1090 cents. How many 8-cent stamps are there?



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641    110 70 120 70 80 ( 450 )   80 90 70 70 110 ( 420 )   [[ 870 ]]