243  Stamp
How many stamps? 1

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There are 160 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 840 cents. How many 3-cent stamps are there?



There are 260 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1800 cents. How many 6-cent stamps are there?



There are 190 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1080 cents. How many 4-cent stamps are there?



There are 220 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 930 cents. How many 3-cent stamps are there?



There are 170 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 650 cents. How many 3-cent stamps are there?



There are 230 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1480 cents. How many 6-cent stamps are there?



There are 150 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 700 cents. How many 5-cent stamps are there?



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 250 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 1110 cents. How many 4-cent stamps are there?



There are 160 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 960 cents. How many 5-cent stamps are there?



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243    70 140 110 130 100 ( 550 )   130 100 100 140 80 ( 550 )   [[ 1100 ]]