How to solve Ax=0.. with 4 unknowns and 4 linear equations I am trying to solve 4 linear equations for a 3D triangulation problem to create a function in matlab code.
I have 4 equations such as
aX + bY + cZ + dW = 0
eX + fY + gZ + hW = 0
iX + jY + kZ + lW = 0
mX + nY + oZ + pW = 0
Here, I have to solve for X, Y, Z and W
I am totally new to linear algebra and solving systems linear equations. Please guide me on how to solve this to obtain the 4 unknowns.
Thanks in advance for your valuable time...

If you want $some$ solution, $X=Y=Z=W=0$ is one. It is also the only solution if the matrix
$$A=\begin{bmatrix}a&b&c&d\\e&f&g&h\\i&j&k&l\\m&n&o&p\end{bmatrix}$$
is invertible. If the matrix $A$ is not invertible, then you have some vectors in its kernel and you have an infinite number of solutions to your question.
