# How to solve by substitution method

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## How can we solve by substitution method

These sites allow users to input a Math problem and receive step-by-step instructions on How to solve by substitution method. A linear algebra solver is a mathematical tool that can be used to solve systems of linear equations. Typically, a linear algebra solver will take as input a set of equations and output the solution to the system. Generally, a linear algebra solver will use one of two methods to find the solution: either Gaussian elimination or LU decomposition. Gaussian elimination is a method that involves adding multiples of one equation to another until the system can be solved by simple inspection. LU decomposition is a method that involves breaking down the matrix of coefficients into a lower triangular matrix and an upper triangular matrix. Once these matrices have been found, the system can be solved by using backward substitution. Linear algebra solvers are essential tools for engineers, physicists, and mathematicians, as they allow for the quick and accurate solution of complex systems of equations.

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