947  Stamp
How many stamps? 1

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There are 210 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1050 cents. How many 4-cent stamps are there?



There are 170 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1050 cents. How many 7-cent stamps are there?



There are 220 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1100 cents. How many 4-cent stamps are there?



There are 250 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 1110 cents. How many 3-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1380 cents. How many 8-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 180 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1110 cents. How many 7-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 910 cents. How many 8-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1590 cents. How many 8-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1230 cents. How many 5-cent stamps are there?



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947    140 100 110 130 110 ( 590 )   150 130 80 120 150 ( 630 )   [[ 1220 ]]