439  Stamp
How many stamps? 1

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There are 210 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1710 cents. How many 7-cent stamps are there?



There are 260 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1540 cents. How many 5-cent stamps are there?



There are 250 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1520 cents. How many 8-cent stamps are there?



There are 230 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1410 cents. How many 5-cent stamps are there?



There are 190 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 830 cents. How many 5-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?



There are 180 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1020 cents. How many 4-cent stamps are there?



There are 240 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1550 cents. How many 6-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1540 cents. How many 7-cent stamps are there?



There are 230 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 950 cents. How many 3-cent stamps are there?



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439    90 140 130 100 130 ( 590 )   110 120 130 130 100 ( 590 )   [[ 1180 ]]