`zgetrs:`procedureThese routines solve a system of linear equations

*A * X = B*or*A' * X = B*with a general N-by-N matrix*A*using the LU factorization computed by the xGETRF routines. Argument*NRHS*is the number of right-hand sides (i.e. number of columns in*B*). Optional arguments*LDA*and*LDB*are the leading dimensions of arrays*A*and*B*, respectively. The return value is the solution matrix*X*.