703  Leg-Stamp
닭다리 개다리 1

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There are 170 heads of Chickens and Dogs together. Altogether there are 480 legs. How many chickens are there?



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



There are 200 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?



There are 180 heads of Chickens and Dogs together. Altogether there are 460 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 200 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1070 cents. How many 4-cent stamps are there?



There are 200 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1200 cents. How many 3-cent stamps are there?



There are 190 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1190 cents. How many 5-cent stamps are there?



There are 220 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1650 cents. How many 7-cent stamps are there?



There are 240 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1200 cents. How many 7-cent stamps are there?

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