791  Stamp
How many stamps? 1

Name : _________________

 

refresh

There are 180 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1260 cents. How many 5-cent stamps are there?



There are 120 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 660 cents. How many 3-cent stamps are there?



There are 190 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1050 cents. How many 3-cent stamps are there?



There are 180 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1150 cents. How many 7-cent stamps are there?



There are 150 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 630 cents. How many 3-cent stamps are there?



There are 230 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1400 cents. How many 8-cent stamps are there?



There are 130 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1010 cents. How many 7-cent stamps are there?



There are 180 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1360 cents. How many 7-cent stamps are there?



There are 190 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1490 cents. How many 7-cent stamps are there?



There are 150 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1170 cents. How many 7-cent stamps are there?



+(         )

 

(         )+

++[[          ]]++

791    90 70 70 70 90 ( 390 )   120 80 130 110 90 ( 530 )   [[ 920 ]]