740  Stamp
How many stamps? 2

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There are 230 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1590 cents. How many 5-cent stamps are there?



There are 230 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1490 cents. How many 6-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1220 cents. How many 7-cent stamps are there?



There are 220 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1610 cents. How many 7-cent stamps are there?



There are 250 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1550 cents. How many 5-cent stamps are there?



There are 210 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1350 cents. How many 3-cent stamps are there?



There are 170 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 890 cents. How many 4-cent stamps are there?



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There are 200 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1380 cents. How many 6-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?



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740    120 120 140 150 150 ( 680 )   90 100 150 140 100 ( 580 )   [[ 1260 ]]