482  Leg-Stamp
닭다리 개다리 1

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There are 110 heads of Chickens and Dogs together. Altogether there are 300 legs. How many chickens are there?



There are 90 heads of Chickens and Dogs together. Altogether there are 280 legs. How many chickens are there?



There are 200 heads of Chickens and Dogs together. Altogether there are 580 legs. How many chickens are there?



There are 230 heads of Chickens and Dogs together. Altogether there are 720 legs. How many chickens are there?



There are 160 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?

There are 200 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1010 cents. How many 4-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1180 cents. How many 7-cent stamps are there?



There are 130 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1030 cents. How many 7-cent stamps are there?



There are 240 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 2040 cents. How many 8-cent stamps are there?



There are 160 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 760 cents. How many 3-cent stamps are there?

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