155  Stamp
How many stamps? 2

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There are 270 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1650 cents. How many 7-cent stamps are there?



There are 190 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 920 cents. How many 8-cent stamps are there?



There are 250 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 2110 cents. How many 8-cent stamps are there?



There are 230 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1340 cents. How many 7-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1350 cents. How many 8-cent stamps are there?

There are 210 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1170 cents. How many 7-cent stamps are there?



There are 270 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1560 cents. How many 8-cent stamps are there?



오늘 4원짜리 7원짜리 우표 총 200 장을 사고, 1010 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 250 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1670 cents. How many 8-cent stamps are there?



There are 230 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1710 cents. How many 6-cent stamps are there?

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