Solve Systems of Equations Using Matrices · Try It 3

Write the system of equations that corresponds to the augmented matrix: $\left[\begin{array}{cccccccccc}1& & & -1& & & 2& & & 3\\ 2& & & 1& & & -2& & & 1\\ 4& & & -1& & & 2& & & 0\end{array}\right].$

OpenStax, Intermediate Algebra 2e · §4.5 Solve Systems of Equations Using Matrices · Try It 3