Express the column matrix \\( \\mathbf{b} \\) as a linear combination of the \\[ A=\\left[\\begin{array}{rrr} 2 & 1 & -1 \\\\ -3 & 3 & 1 \\end{array}\ ight], \\quad \\mathbf{b}=\\left[\\begin{array}{r} -7 \\\\ 9 \\end{array}\ ight] \\]