445  Stamp
How many stamps? 1

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There are 140 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 930 cents. How many 7-cent stamps are there?



There are 160 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1090 cents. How many 4-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 6-cent stamps and 7-cent stamps. Altogether they cost 980 cents. How many 6-cent stamps are there?



There are 230 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1180 cents. How many 6-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1220 cents. How many 7-cent stamps are there?



There are 220 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1710 cents. How many 6-cent stamps are there?



There are 150 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 970 cents. How many 7-cent stamps are there?



There are 250 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1740 cents. How many 6-cent stamps are there?



There are 160 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 800 cents. How many 4-cent stamps are there?



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445    90 70 80 70 130 ( 440 )   140 90 70 130 80 ( 510 )   [[ 950 ]]