The document describes a system of linear equations in matrix form. There are 4 equations (A1=, A2=, A3=, A4=) with 4 unknowns (X1, X2, X3, X4). The coefficients of the equations are provided in a 4x4 matrix and the constant terms are provided in a column vector. The document also shows the steps to solve the system of equations using matrix multiplication and inversion to obtain the solutions for the unknowns X1, X2, X3, X4.

1. Metodo de Thomas
B1 C1 X1 R1
A2 B2 C2 X X2 = R2
A3 B3 C3 X3 R3
A4 B4 X4 R4
2.04 -1 X1 40.8 A1=
-1 2.04 -1 X X2 = 0.8 A2=
-1 2.04 -1 X3 0.8 A3=
-1 2.04 X4 200.8 A4=
1 U11 U12
L21 1 X U22 U23 =
L32 1 U33 U34
L43 1 U44
1 2.04 -1
-0.4902 1 1.5498 -1
-0.64524 1 X 1.394757 -1 =
-0.71697 1 1.32303
1 D1 R1
L21 1 X D2 = R2
L32 1 D3 R3
L43 1 D4 R4
1 40.8 40.8
-0.4902 1 X 20.8 = 0.8
-0.64524 1 14.221053 0.8
-0.71697 1 210.99608 200.8
U11 U12 X1 D1
U22 U23 X X2 = D2
U33 U34 X3 D3
U44 X4 D4

2. 2.04 -1 65.969834 40.8 RESPUESTA=
1.549804 -1 X 93.778462 = 20.8
1.39476 -1 124.53823 14.22105
1.323 159.47952 210.9961

3. 0 B1= 2.04 C1= -1 R1= 40.8
-1 B2= 2.04 C2= -1 R2= 0.8
-1 B3= 2.04 C3= -1 R3= 0.8
-1 B4= 2.04 C4= 0 R4= 200.8
B1 C1
A2 B2 C2
A3 B3 C3
A4 B4
2.04 -1
-1 2.04 -1
-1 2.04 -1
-1 2.04

4. RESPUESTA= 65.97
93.778
124.54
159.48