787  Leg-Stamp
닭다리 개다리 2

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There are 210 heads of Chickens and Dogs together. Altogether there are 600 legs. How many chickens are there?



There are 160 heads of Chickens and Dogs together. Altogether there are 380 legs. How many chickens are there?



우리 안에 총 130 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 360 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 110 heads of Chickens and Dogs together. Altogether there are 360 legs. How many chickens are there?



There are 70 heads of Chickens and Dogs together. Altogether there are 200 legs. How many chickens are there?

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



There are 220 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1010 cents. How many 3-cent stamps are there?



오늘 7원짜리 8원짜리 우표 총 130장을 사고, 970 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 200 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1220 cents. How many 7-cent stamps are there?



There are 160 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1100 cents. How many 8-cent stamps are there?

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