Sub SolveLinearSystem() Dim A(1 To 3, 1 To 3) As Double Dim b(1 To 3) As Double Dim x(1 To 3) As Double Dim n As Integer: n = 3 ' Coefficient matrix A(1, 1) = 2: A(1, 2) = 1: A(1, 3) = -1 A(2, 1) = -3: A(2, 2) = -1: A(2, 3) = 2 A(3, 1) = -2: A(3, 2) = 1: A(3, 3) = 2
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' Output to Immediate Window For i = 1 To n Debug.Print "x" & i & " = " & x(i) Next i End Sub Sub SolveLinearSystem() Dim A(1 To 3, 1 To
Sub GaussianElimination(A, b, x, n) ' Implementation from typical PDF (pivoting, forward elimination, back substitution) ' ... (code omitted for brevity, but fully detailed in recommended books) End Sub Type "numerical methods with vba" site:springer
Call GaussianElimination(A, b, x, n)
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' RHS vector b(1) = 8: b(2) = -11: b(3) = -3
