658  Stamp
How many stamps? 1

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There are 180 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 820 cents. How many 3-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1290 cents. How many 5-cent stamps are there?



There are 270 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1470 cents. How many 5-cent stamps are there?



There are 200 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1400 cents. How many 5-cent stamps are there?



There are 250 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1450 cents. How many 5-cent stamps are there?



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



There are 200 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 840 cents. How many 5-cent stamps are there?



There are 180 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1270 cents. How many 4-cent stamps are there?



There are 200 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 650 cents. How many 3-cent stamps are there?



There are 170 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 810 cents. How many 3-cent stamps are there?



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658    110 150 150 100 150 ( 660 )   70 120 70 150 70 ( 480 )   [[ 1140 ]]