439  Stamp
How many stamps? 1

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There are 170 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 960 cents. How many 8-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1260 cents. How many 7-cent stamps are there?



There are 190 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1040 cents. How many 8-cent stamps are there?



There are 140 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 560 cents. How many 5-cent stamps are there?



There are 220 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 740 cents. How many 3-cent stamps are there?



There are 220 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1500 cents. How many 8-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1480 cents. How many 8-cent stamps are there?



There are 180 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 740 cents. How many 3-cent stamps are there?



There are 180 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1060 cents. How many 7-cent stamps are there?



There are 190 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 730 cents. How many 3-cent stamps are there?



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439    90 140 70 70 140 ( 510 )   90 140 80 130 110 ( 550 )   [[ 1060 ]]