556  Stamp
How many stamps? 1

Name : _________________

 

refresh

There are 190 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1160 cents. How many 8-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1460 cents. How many 5-cent stamps are there?



There are 210 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1380 cents. How many 6-cent stamps are there?



There are 190 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1350 cents. How many 5-cent stamps are there?



There are 160 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1010 cents. How many 6-cent stamps are there?



There are 250 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1550 cents. How many 5-cent stamps are there?



There are 260 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 1040 cents. How many 5-cent stamps are there?



There are 210 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1320 cents. How many 4-cent stamps are there?



There are 220 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1140 cents. How many 3-cent stamps are there?



There are 160 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 750 cents. How many 5-cent stamps are there?



+(         )

 

(         )+

++[[          ]]++

556    70 130 90 90 110 ( 490 )   150 130 90 140 110 ( 620 )   [[ 1110 ]]