987  Stamp
How many stamps? 1

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There are 220 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1210 cents. How many 3-cent stamps are there?



There are 190 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1280 cents. How many 8-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1160 cents. How many 8-cent stamps are there?



There are 180 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 590 cents. How many 3-cent stamps are there?



There are 260 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1700 cents. How many 7-cent stamps are there?



There are 230 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1690 cents. How many 7-cent stamps are there?



There are 230 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1740 cents. How many 7-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1460 cents. How many 7-cent stamps are there?



There are 220 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1230 cents. How many 6-cent stamps are there?



There are 190 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1090 cents. How many 6-cent stamps are there?



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987    110 130 90 130 140 ( 600 )   150 100 140 130 140 ( 660 )   [[ 1260 ]]