588  Stamp
How many stamps? 1

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There are 200 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1040 cents. How many 7-cent stamps are there?



There are 130 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 860 cents. How many 7-cent stamps are there?



There are 180 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 800 cents. How many 4-cent stamps are there?



There are 190 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1270 cents. How many 8-cent stamps are there?



There are 140 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 680 cents. How many 4-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1070 cents. How many 4-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1590 cents. How many 7-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1250 cents. How many 8-cent stamps are there?



There are 180 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1100 cents. How many 7-cent stamps are there?



There are 260 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1440 cents. How many 6-cent stamps are there?



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588    110 80 100 140 80 ( 510 )   110 150 130 100 140 ( 630 )   [[ 1140 ]]