638  Stamp
How many stamps? 1

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There are 170 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 630 cents. How many 3-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1210 cents. How many 8-cent stamps are there?



There are 150 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 900 cents. How many 5-cent stamps are there?



There are 220 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1360 cents. How many 4-cent stamps are there?



There are 190 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 680 cents. How many 4-cent stamps are there?



There are 270 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 930 cents. How many 3-cent stamps are there?



There are 180 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 890 cents. How many 3-cent stamps are there?



There are 180 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 990 cents. How many 8-cent stamps are there?



There are 150 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 700 cents. How many 3-cent stamps are there?



There are 240 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 2020 cents. How many 8-cent stamps are there?



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638    110 70 100 100 110 ( 490 )   150 110 90 100 140 ( 590 )   [[ 1080 ]]