960  Stamp
How many stamps? 2

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There are 230 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1750 cents. How many 8-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1210 cents. How many 7-cent stamps are there?



There are 180 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1080 cents. How many 8-cent stamps are there?



There are 130 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 640 cents. How many 3-cent stamps are there?



There are 160 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1070 cents. How many 8-cent stamps are there?



There are 190 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 810 cents. How many 4-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1300 cents. How many 7-cent stamps are there?



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There are 220 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1180 cents. How many 5-cent stamps are there?



There are 190 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 960 cents. How many 4-cent stamps are there?



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960    140 80 90 80 90 ( 480 )   140 100 100 140 140 ( 620 )   [[ 1100 ]]