302  Stamp
How many stamps? 1

Name : _________________

refresh

There are 150 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 610 cents. How many 5-cent stamps are there?



There are 150 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 840 cents. How many 7-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1710 cents. How many 8-cent stamps are there?



There are 230 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1850 cents. How many 7-cent stamps are there?



There are 190 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1340 cents. How many 6-cent stamps are there?

There are 170 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 690 cents. How many 5-cent stamps are there?



There are 270 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 1110 cents. How many 5-cent stamps are there?



There are 240 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 1020 cents. How many 5-cent stamps are there?



There are 150 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 770 cents. How many 7-cent stamps are there?



There are 130 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 700 cents. How many 5-cent stamps are there?

+(         )

(         )+

++[[          ]]++