676  Stamp
How many stamps? 1

Name : _________________

 

refresh

There are 170 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 950 cents. How many 5-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1190 cents. How many 4-cent stamps are there?



There are 240 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 1090 cents. How many 4-cent stamps are there?



There are 240 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1500 cents. How many 7-cent stamps are there?



There are 220 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1400 cents. How many 8-cent stamps are there?



There are 250 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1200 cents. How many 4-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 700 cents. How many 4-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 860 cents. How many 8-cent stamps are there?



There are 170 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 600 cents. How many 4-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1720 cents. How many 8-cent stamps are there?



+(         )

 

(         )+

++[[          ]]++

676    120 70 110 150 100 ( 550 )   150 100 70 90 80 ( 490 )   [[ 1040 ]]