rubydai03 rubydai03

30-07-2018
Mathematics

contestada

Please Help ME!!

A farm has cows and ducks. There are 78 feet and 27 heads. How many of each animal are there? Please also show how you know.

Respuesta :

wolf1728 wolf1728

30-07-2018

A) 4*c + 2*D = 78

B) C + D =27

Multiplying B) by -2 equals

B) -2 C -2 D = -54 then adding equation A)

A) 4*c + 2*D = 78

2C = 24

Cows = 12

Ducks = 15

********************************** DOUBLE CHECK

B) C + D =27

12 + 15 = 27

Correct!

Answer Link

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