542  Stamp
How many stamps? 1

Name : _________________

 

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There are 170 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 990 cents. How many 5-cent stamps are there?



There are 240 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 980 cents. How many 5-cent stamps are there?



There are 250 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1470 cents. How many 5-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1120 cents. How many 7-cent stamps are there?



There are 140 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 920 cents. How many 8-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1790 cents. How many 8-cent stamps are there?



There are 220 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1530 cents. How many 6-cent stamps are there?



There are 270 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1650 cents. How many 7-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1250 cents. How many 7-cent stamps are there?



There are 220 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 750 cents. How many 3-cent stamps are there?



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542    100 130 140 130 90 ( 590 )   100 150 150 100 130 ( 630 )   [[ 1220 ]]