Elimination of augmented matrix?

The problem of elimination refers to eliminating or removing an unknown meaning.

The ancients in China called the unknowns in mathematics "yuan". When a math problem has only one unknown number, it can be solved by general mathematical methods, and when there are multiple unknowns, it must be solved by elimination method.

The basic elimination problem generally refers to: there are two interrelated unknowns in the problem, one of which is the same through equation deformation, and then eliminated.

The application of elimination method in equation: the general methods are addition, subtraction and substitution.

If the number of equations is less than the unknown, it is called indefinite equation (group), and it is generally impossible to find the specific answer by elimination method.