## Elementary Linear Algebra 7th Edition

Multiplying the first row by $-4$ and then adding the result to the second row.
$$\left|\begin{array}{rr}{2} & {-3} \\ {8} & {7}\end{array}\right|=\left|\begin{array}{cc}{2} & {-3} \\ {0} & {19}\end{array}\right|.$$ Multiplying the first row by $-4$ and then adding the result to the second row.