472  Stamp
How many stamps? 1

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There are 180 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 900 cents. How many 6-cent stamps are there?



There are 120 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 890 cents. How many 7-cent stamps are there?



There are 180 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 900 cents. How many 3-cent stamps are there?



There are 180 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1260 cents. How many 6-cent stamps are there?



There are 160 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1280 cents. How many 7-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 960 cents. How many 5-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1120 cents. How many 5-cent stamps are there?



There are 180 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1440 cents. How many 7-cent stamps are there?



There are 200 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 740 cents. How many 5-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 980 cents. How many 4-cent stamps are there?



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472    90 70 90 120 80 ( 450 )   150 140 90 70 140 ( 590 )   [[ 1040 ]]