940  Stamp
How many stamps? 1

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There are 220 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1560 cents. How many 6-cent stamps are there?



There are 250 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1480 cents. How many 8-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1440 cents. How many 8-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1340 cents. How many 7-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1460 cents. How many 8-cent stamps are there?



There are 280 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1590 cents. How many 8-cent stamps are there?



There are 150 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 810 cents. How many 5-cent stamps are there?



There are 220 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1680 cents. How many 8-cent stamps are there?



There are 240 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1400 cents. How many 4-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 680 cents. How many 4-cent stamps are there?



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940    140 120 130 80 130 ( 600 )   150 90 140 130 80 ( 590 )   [[ 1190 ]]