242  Stamp
How many stamps? 1

Name : _________________

 

refresh

There are 180 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 890 cents. How many 8-cent stamps are there?



There are 150 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1000 cents. How many 8-cent stamps are there?



There are 140 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 900 cents. How many 5-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1500 cents. How many 8-cent stamps are there?



There are 260 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1430 cents. How many 7-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1180 cents. How many 8-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1290 cents. How many 7-cent stamps are there?



There are 220 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1520 cents. How many 6-cent stamps are there?



There are 280 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 1270 cents. How many 5-cent stamps are there?



There are 180 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 780 cents. How many 5-cent stamps are there?



+(         )

 

(         )+

++[[          ]]++

242    70 100 90 150 130 ( 540 )   110 150 120 150 120 ( 650 )   [[ 1190 ]]