1 answer:
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!
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