430  Stamp
How many stamps? 1

Name : _________________

refresh

There are 220 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1530 cents. How many 4-cent stamps are there?



There are 260 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1490 cents. How many 7-cent stamps are there?



There are 140 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 910 cents. How many 7-cent stamps are there?



There are 220 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 780 cents. How many 4-cent stamps are there?



There are 120 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 810 cents. How many 8-cent stamps are there?

There are 190 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1310 cents. How many 4-cent stamps are there?



There are 160 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 710 cents. How many 4-cent stamps are there?



There are 250 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1230 cents. How many 3-cent stamps are there?



There are 140 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1040 cents. How many 7-cent stamps are there?



There are 150 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 880 cents. How many 8-cent stamps are there?

+(         )

(         )+

++[[          ]]++