526  Stamp
How many stamps? 1

Name : _________________

 

refresh

There are 170 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 910 cents. How many 7-cent stamps are there?



There are 230 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1260 cents. How many 5-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1500 cents. How many 5-cent stamps are there?



There are 130 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 830 cents. How many 5-cent stamps are there?



There are 270 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1530 cents. How many 7-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 710 cents. How many 4-cent stamps are there?



There are 220 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1490 cents. How many 8-cent stamps are there?



There are 150 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 530 cents. How many 4-cent stamps are there?



There are 130 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 760 cents. How many 4-cent stamps are there?



There are 230 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 1000 cents. How many 4-cent stamps are there?



+(         )

 

(         )+

++[[          ]]++

526    100 120 120 70 150 ( 560 )   110 130 80 70 150 ( 540 )   [[ 1100 ]]