591  Leg-Stamp
닭다리 개다리 1

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There are 220 heads of Chickens and Dogs together. Altogether there are 700 legs. How many chickens are there?



There are 140 heads of Chickens and Dogs together. Altogether there are 360 legs. How many chickens are there?



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



There are 160 heads of Chickens and Dogs together. Altogether there are 520 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 190 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1290 cents. How many 6-cent stamps are there?



There are 230 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1330 cents. How many 5-cent stamps are there?



There are 170 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 870 cents. How many 6-cent stamps are there?



There are 240 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1810 cents. How many 8-cent stamps are there?



There are 180 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1440 cents. How many 7-cent stamps are there?

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