191  Stamp
How many stamps? 1

Name : _________________

refresh

There are 170 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1120 cents. How many 6-cent stamps are there?



There are 190 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1210 cents. How many 7-cent stamps are there?



There are 260 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 2190 cents. How many 8-cent stamps are there?



There are 160 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 660 cents. How many 5-cent stamps are there?



There are 230 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1930 cents. How many 8-cent stamps are there?

There are 230 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1540 cents. How many 6-cent stamps are there?



There are 190 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1210 cents. How many 7-cent stamps are there?



There are 190 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1220 cents. How many 6-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1200 cents. How many 8-cent stamps are there?



There are 240 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1320 cents. How many 7-cent stamps are there?

+(         )

(         )+

++[[          ]]++