635  Stamp
How many stamps? 2

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There are 170 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 800 cents. How many 4-cent stamps are there?



There are 120 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 560 cents. How many 3-cent stamps are there?



There are 150 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 550 cents. How many 3-cent stamps are there?



There are 130 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 880 cents. How many 6-cent stamps are there?



There are 160 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 960 cents. How many 3-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1670 cents. How many 7-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1000 cents. How many 4-cent stamps are there?



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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 180 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1320 cents. How many 6-cent stamps are there?



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635    110 70 100 80 80 ( 440 )   110 100 70 70 100 ( 450 )   [[ 890 ]]