457  Stamp
How many stamps? 1

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There are 170 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 760 cents. How many 4-cent stamps are there?



There are 130 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 740 cents. How many 8-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1240 cents. How many 4-cent stamps are there?



There are 160 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1010 cents. How many 8-cent stamps are there?



There are 140 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1180 cents. How many 8-cent stamps are there?



There are 190 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 630 cents. How many 3-cent stamps are there?



There are 180 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1460 cents. How many 7-cent stamps are there?



There are 200 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 940 cents. How many 6-cent stamps are there?



There are 170 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 920 cents. How many 7-cent stamps are there?



There are 220 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1280 cents. How many 7-cent stamps are there?



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457    90 70 90 70 80 ( 400 )   130 80 70 80 90 ( 450 )   [[ 850 ]]