335  Leg-Stamp
닭다리 개다리 2

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There are 130 heads of Chickens and Dogs together. Altogether there are 420 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 540 legs. How many chickens are there?



우리 안에 총 270 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 800 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 150 heads of Chickens and Dogs together. Altogether there are 440 legs. How many chickens are there?



There are 120 heads of Chickens and Dogs together. Altogether there are 380 legs. How many chickens are there?

There are 220 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1340 cents. How many 7-cent stamps are there?



There are 120 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 560 cents. How many 3-cent stamps are there?



오늘 4원짜리 7원짜리 우표 총 240장을 사고, 1260 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 220 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 960 cents. How many 5-cent stamps are there?



There are 230 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1930 cents. How many 8-cent stamps are there?

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