\vec{p}=\begin{pmatrix}x_1\ \vdots\x_j\ \vdots\x_n\end{pmatrix}

\det A\neq 0

x_j=\frac{1}{\det\:A}\det 

\begin{pmatrix}x_1\ \vdots\x_j\ \vdots\x_n\end{pmatrix}

\begin{matrix}b_1\ \vdots\\vdots\\vdots\b_n\end{matrix}

\begin{pmatrix}b_1\ \vdots\\vdots\\vdots\b_n\end{pmatrix}

A

\vec p

=\vec b

=

A

\vec p

=

\vec b

j

R = (16.5, 0)
Q = Point(xAxis)
u = Vector(Q, R)
W = Point(u)
A = (1.5, 4.5)
B = (4.5, 4.5)
C = (4.5, 1.5)
D = (1.5, 1.5)
v1, a, b, c, d = Polygon(A, B, C, D)
E = (5, 4.5)
F = (5.5, 4.5)
G = (5.5, 1.5)
H = (5, 1.5)
v2, e, f, g, h = Polygon(E, F, G, H)
I = (6.5, 4.5)
J = (7, 4.5)
K = (7, 1.5)
L = (6.5, 1.5)
v3, i, j, k, l = Polygon(I, J, K, L)
M = (14, 4.5)
N = (17, 4.5)
O = (17, 1.5)
P = (14, 1.5)
v4, m, n, o, p = Polygon(M, N, O, P)
E' = Translate(E, u)
F' = Translate(F, u)
G' = Translate(G, u)
H' = Translate(H, u)
S = (20, 3)
T = (13.840011074197122, 4.105771871539315)
q = Circle(S, T)
U = Point(q)
V = Point(q)
r = CircleArc(S, V, U)
s = OrthogonalLine(W, u, xOyPlane)
r' = Mirror(r, s)
Z = (7.5, 3)
v = Vector(S, Z)
r'_1 = Translate(r, v)
r'' = Translate(r', v)
A_1 = Point(v4)
B_1 = Point(v4)
C_1 = Point(v4)
D_1 = Point(v4)
v5, a_1, b_1, d_1, c_1 = Polygon(A_1, B_1, D_1, C_1)