[tex]\begin{gathered} Let\colon \\ x+z=6_{\text{ }}(A) \\ 3x+2z=1_{\text{ }}(B) \end{gathered}[/tex][tex]\begin{gathered} Multiply_{\text{ }}A_{\text{ }}by_{\text{ }}-2\colon \\ -2(x+z)=-2(6) \\ -2x-2z=-12 \\ Add_{\text{ }}A_{\text{ }}and_{\text{ }}B\colon \\ -2x+3x-2z+2z=-12+1 \\ x=-11 \end{gathered}[/tex]
Answer:
multiply equation A by -2
