This is a tool to solve a system of linear equations. It can solve up to 20 simultaneous equations.

Download

.xls file (21 KB)

How to use the tool

To solve the system Ax = b, first key in the number of equations into the cell C4.

Then key in the matrix A into the yellow cells and b into the blue cells.

The solution x is obtained in column X, it is highlighted in green.

This screenshot shows the entries and solution for the following system:

2x₁ + 3x₂ + 3x₃ = 1
2x₁ + 3x₂ + 2x₃ = 1
3x₁ + 3x₂ + 3x₃ = 3

The solution obtained is x₁ = 2, x₂ = -1 and x₃ = 0.