775  Stamp
How many stamps? 1

Name : _________________

 

refresh

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 150 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 800 cents. How many 6-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1210 cents. How many 7-cent stamps are there?



There are 190 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1250 cents. How many 7-cent stamps are there?



There are 180 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1080 cents. How many 5-cent stamps are there?



There are 230 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1280 cents. How many 6-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 1000 cents. How many 5-cent stamps are there?



There are 240 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1220 cents. How many 4-cent stamps are there?



There are 200 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1160 cents. How many 5-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1320 cents. How many 4-cent stamps are there?



+(         )

 

(         )+

++[[          ]]++

775    130 100 80 110 120 ( 540 )   130 120 110 120 70 ( 550 )   [[ 1090 ]]