284  Stamp
How many stamps? 2

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There are 170 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 840 cents. How many 6-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 970 cents. How many 5-cent stamps are there?



There are 260 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1940 cents. How many 7-cent stamps are there?



There are 280 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 2070 cents. How many 6-cent stamps are there?



There are 220 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1010 cents. How many 3-cent stamps are there?



There are 250 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1620 cents. How many 7-cent stamps are there?



There are 200 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1100 cents. How many 5-cent stamps are there?



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There are 260 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1540 cents. How many 5-cent stamps are there?



There are 220 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1480 cents. How many 4-cent stamps are there?



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284    80 130 140 150 150 ( 650 )   120 150 120 140 100 ( 630 )   [[ 1280 ]]