658  Leg-Stamp
닭다리 개다리 1

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There are 120 heads of Chickens and Dogs together. Altogether there are 300 legs. How many chickens are there?



There are 150 heads of Chickens and Dogs together. Altogether there are 380 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 100 heads of Chickens and Dogs together. Altogether there are 320 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?

There are 170 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 950 cents. How many 7-cent stamps are there?



There are 130 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1090 cents. How many 8-cent stamps are there?



There are 240 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1260 cents. How many 3-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1240 cents. How many 4-cent stamps are there?



There are 160 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 730 cents. How many 3-cent stamps are there?

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