864  Leg-Stamp
닭다리 개다리 2

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There are 180 heads of Chickens and Dogs together. Altogether there are 500 legs. How many chickens are there?



There are 260 heads of Chickens and Dogs together. Altogether there are 760 legs. How many chickens are there?



우리 안에 총 140 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 360 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 90 heads of Chickens and Dogs together. Altogether there are 260 legs. How many chickens are there?



There are 120 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



There are 210 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1140 cents. How many 5-cent stamps are there?



There are 160 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1350 cents. How many 8-cent stamps are there?



오늘 7원짜리 4원짜리 우표 총 220장을 사고, 1210 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 180 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 780 cents. How many 5-cent stamps are there?



There are 230 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1180 cents. How many 4-cent stamps are there?



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