109  Stamp
How many stamps? 2

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There are 280 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1570 cents. How many 7-cent stamps are there?



There are 240 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1710 cents. How many 6-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1530 cents. How many 7-cent stamps are there?



There are 170 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 920 cents. How many 4-cent stamps are there?



There are 220 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1400 cents. How many 8-cent stamps are there?

There are 130 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 680 cents. How many 6-cent stamps are there?



There are 240 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1740 cents. How many 8-cent stamps are there?



오늘 6원짜리 7원짜리 우표 총 210 장을 사고, 1390 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 150 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 960 cents. How many 6-cent stamps are there?



There are 120 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 630 cents. How many 4-cent stamps are there?

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