488  Stamp
How many stamps? 1

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There are 200 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1080 cents. How many 4-cent stamps are there?



There are 170 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 690 cents. How many 5-cent stamps are there?



There are 260 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 1170 cents. How many 5-cent stamps are there?



There are 160 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 640 cents. How many 3-cent stamps are there?



There are 140 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 660 cents. How many 4-cent stamps are there?



There are 190 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 860 cents. How many 5-cent stamps are there?



There are 200 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 960 cents. How many 3-cent stamps are there?



There are 170 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1080 cents. How many 4-cent stamps are there?



There are 190 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 790 cents. How many 3-cent stamps are there?



There are 160 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 690 cents. How many 3-cent stamps are there?



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488    130 90 130 80 90 ( 520 )   100 140 90 80 90 ( 500 )   [[ 1020 ]]