506  Leg-Stamp
닭다리 개다리 2

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



There are 110 heads of Chickens and Dogs together. Altogether there are 280 legs. How many chickens are there?



우리 안에 총 90 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 280 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 160 heads of Chickens and Dogs together. Altogether there are 460 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 580 legs. How many chickens are there?

There are 170 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1310 cents. How many 8-cent stamps are there?



There are 270 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1680 cents. How many 8-cent stamps are there?



오늘 8원짜리 6원짜리 우표 총 190장을 사고, 1420 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?



There are 120 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 820 cents. How many 6-cent stamps are there?



There are 250 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1900 cents. How many 8-cent stamps are there?

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