Solve the system of linear equations, using the matrix methods:
S o l u t i o n
Let's record the given system of linear equations in the matrix form:
The solution of the given system of linear equations in the matrix form looks like:
– an inverse matrix to a matrix
consequently, the matrix A has an inverse matrix .
First we’ll find an adjoint matrix Ã which in the given example looks like:
where – algebraic additions of appropriating elements of matrix A .
In our case we’ll receive:
Then the inverse matrix is equal:
Now we’ll find the solution of the given system of equations. As, then
Thus, the solution of the given system of equations:
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