581  Stamp
How many stamps? 1

Name : _________________

refresh

There are 220 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 770 cents. How many 3-cent stamps are there?



There are 270 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1610 cents. How many 5-cent stamps are there?



There are 170 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 840 cents. How many 4-cent stamps are there?



There are 150 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 800 cents. How many 5-cent stamps are there?



There are 200 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1110 cents. How many 6-cent stamps are there?

There are 210 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 780 cents. How many 4-cent stamps are there?



There are 180 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 740 cents. How many 5-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1020 cents. How many 4-cent stamps are there?



There are 170 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 890 cents. How many 4-cent stamps are there?



There are 260 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1400 cents. How many 4-cent stamps are there?

+(         )

(         )+

++[[          ]]++