Finite Math Examples

$[\begin{array}{c} 1 & - 2 & 0 & 0 \\ 1 & 1 & 1 & 310 \\ 350000 & 70000 & 60000 & 15000000 \end{array}]$

Step 1

Transpose the matrix by switching its rows to columns.

$[\begin{array}{c} 1 & 1 & 350000 \\ - 2 & 1 & 70000 \\ 0 & 1 & 60000 \\ 0 & 310 & 15000000 \end{array}]$