595  Leg-Stamp
닭다리 개다리 1

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There are 150 heads of Chickens and Dogs together. Altogether there are 420 legs. How many chickens are there?



There are 190 heads of Chickens and Dogs together. Altogether there are 560 legs. How many chickens are there?



There are 180 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 420 legs. How many chickens are there?



There are 130 heads of Chickens and Dogs together. Altogether there are 380 legs. How many chickens are there?

There are 230 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1230 cents. How many 3-cent stamps are there?



There are 140 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 760 cents. How many 4-cent stamps are there?



There are 160 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1070 cents. How many 5-cent stamps are there?



There are 130 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 790 cents. How many 8-cent stamps are there?



There are 180 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1280 cents. How many 8-cent stamps are there?

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