304  Stamp
How many stamps? 1

Name : _________________

refresh

There are 130 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 670 cents. How many 4-cent stamps are there?



There are 240 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1350 cents. How many 6-cent stamps are there?



There are 120 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 870 cents. How many 6-cent stamps are there?



There are 180 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 820 cents. How many 3-cent stamps are there?



There are 170 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1220 cents. How many 6-cent stamps are there?

There are 140 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 920 cents. How many 7-cent stamps are there?



There are 220 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1420 cents. How many 6-cent stamps are there?



There are 130 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 600 cents. How many 5-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1170 cents. How many 5-cent stamps are there?



There are 190 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1310 cents. How many 5-cent stamps are there?

+(         )

(         )+

++[[          ]]++