What will be the normal equation for z if the equations are given as 3x+9y+4z-43

Question

What will be the normal equation for z if the equations are given as 3x+9y+4z-43=0, 2x+6y+z-5=0. Assume these are having equal weights.

Options:

A . 17x+42y+47z-178=0

B . 14x+17y+42z-178=0

C . 14x+42y+17z-178=0

D . 42x+14y+17z-178=0

Answer: Option C
Answer: (c).14x+42y+17z-178=0

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