[tex]\begin{gathered} A\colon6x-3y=-4 \\ B\colon_{\text{ }}-4x-y=5 \end{gathered}[/tex]
Using elimination:
[tex]\begin{gathered} (A)-3(B)\colon \\ 6x+12x-3y+3y=-4-15 \\ 18x=-19 \end{gathered}[/tex]
Therefore, the answer is:
B) Multiply A by 1 and B by -3
