879  Leg-Stamp
닭다리 개다리 2

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There are 140 heads of Chickens and Dogs together. Altogether there are 480 legs. How many chickens are there?



There are 160 heads of Chickens and Dogs together. Altogether there are 440 legs. How many chickens are there?



우리 안에 총 140 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 480 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 190 heads of Chickens and Dogs together. Altogether there are 480 legs. How many chickens are there?



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

There are 200 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 840 cents. How many 5-cent stamps are there?



There are 240 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1460 cents. How many 5-cent stamps are there?



오늘 7원짜리 6원짜리 우표 총 210장을 사고, 1370 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 210 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1490 cents. How many 4-cent stamps are there?



There are 260 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 2190 cents. How many 8-cent stamps are there?

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