489  Leg-Stamp
닭다리 개다리 1

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There are 160 heads of Chickens and Dogs together. Altogether there are 500 legs. How many chickens are there?



There are 190 heads of Chickens and Dogs together. Altogether there are 580 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 170 heads of Chickens and Dogs together. Altogether there are 440 legs. How many chickens are there?



There are 150 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?

There are 230 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1390 cents. How many 5-cent stamps are there?



There are 210 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 730 cents. How many 3-cent stamps are there?



There are 130 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1010 cents. How many 7-cent stamps are there?



There are 220 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1740 cents. How many 7-cent stamps are there?



There are 230 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1570 cents. How many 8-cent stamps are there?

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