978  Stamp
How many stamps? 2

Name : _________________

refresh

There are 280 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1810 cents. How many 6-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1650 cents. How many 7-cent stamps are there?



There are 220 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1060 cents. How many 6-cent stamps are there?



There are 180 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1350 cents. How many 8-cent stamps are there?



There are 190 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 930 cents. How many 3-cent stamps are there?

There are 150 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 950 cents. How many 6-cent stamps are there?



There are 250 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1450 cents. How many 5-cent stamps are there?



오늘 6원짜리 8원짜리 우표 총 230 장을 사고, 1640 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 150 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 800 cents. How many 3-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 830 cents. How many 5-cent stamps are there?

+(         )

(         )+

++[[          ]]++