849  Stamp
How many stamps? 1

Name : _________________

 

refresh

There are 220 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1110 cents. How many 3-cent stamps are there?



There are 230 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 1020 cents. How many 6-cent stamps are there?



There are 160 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 560 cents. How many 3-cent stamps are there?



There are 210 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 750 cents. How many 3-cent stamps are there?



There are 130 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 490 cents. How many 3-cent stamps are there?



There are 180 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 990 cents. How many 4-cent stamps are there?



There are 140 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 800 cents. How many 5-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1120 cents. How many 7-cent stamps are there?



There are 230 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 1030 cents. How many 4-cent stamps are there?



There are 150 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 980 cents. How many 7-cent stamps are there?



+(         )

 

(         )+

++[[          ]]++

849    130 110 80 90 80 ( 490 )   90 90 130 120 80 ( 510 )   [[ 1000 ]]