397  Leg-Stamp
닭다리 개다리 1

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There are 130 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



There are 80 heads of Chickens and Dogs together. Altogether there are 220 legs. How many chickens are there?



There are 160 heads of Chickens and Dogs together. Altogether there are 560 legs. How many chickens are there?



There are 140 heads of Chickens and Dogs together. Altogether there are 380 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 460 legs. How many chickens are there?

There are 150 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1150 cents. How many 7-cent stamps are there?



There are 240 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1650 cents. How many 8-cent stamps are there?



There are 250 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1550 cents. How many 4-cent stamps are there?



There are 160 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1040 cents. How many 6-cent stamps are there?



There are 250 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1520 cents. How many 8-cent stamps are there?

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