[tex]\begin{gathered} \text{ Multiply row 1 by -2} \\ \text{ Row 1} \\ 4\cdot(-2)=-8 \\ -1\cdot(-2)=2 \\ -4\cdot(-2)=8 \\ \text{ and add to row 2} \\ \text{Row 2} \\ -1+(-8)=-9 \\ -1+2=1 \\ 6+8=14 \\ \text{ Row 2 is now} \\ -9 \\ 1 \\ 14 \end{gathered}[/tex]
