585  Stamp
How many stamps? 2

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There are 160 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1000 cents. How many 5-cent stamps are there?



There are 170 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1290 cents. How many 6-cent stamps are there?



There are 150 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1100 cents. How many 8-cent stamps are there?



There are 230 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1520 cents. How many 7-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1110 cents. How many 7-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1160 cents. How many 5-cent stamps are there?



There are 170 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1010 cents. How many 7-cent stamps are there?



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There are 150 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 950 cents. How many 5-cent stamps are there?



There are 160 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 940 cents. How many 5-cent stamps are there?



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585    110 80 100 140 90 ( 520 )   100 110 150 100 90 ( 550 )   [[ 1070 ]]