def unmake_homogenous(x):
    """'Unmakes' a matrix of homogenous coordinats as row vectors homogenous.

    Arguments:
        x (float[w, h]): Matrix of row vectors.

    Returns:
        float[w - 1, h]: x normalized by last column vector, without the last 
            column vector.
    """
    return x[:-1] / x[-1]