805  Stamp
How many stamps? 1

Name : _________________

 

refresh

There are 260 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1430 cents. How many 4-cent stamps are there?



There are 200 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1330 cents. How many 5-cent stamps are there?



There are 160 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 660 cents. How many 3-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1110 cents. How many 7-cent stamps are there?



There are 210 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 830 cents. How many 3-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1530 cents. How many 7-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 930 cents. How many 5-cent stamps are there?



There are 170 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 980 cents. How many 7-cent stamps are there?



There are 270 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1880 cents. How many 6-cent stamps are there?



There are 170 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1250 cents. How many 5-cent stamps are there?



+(         )

 

(         )+

++[[          ]]++

805    130 90 100 120 110 ( 550 )   150 90 100 140 70 ( 550 )   [[ 1100 ]]