Answer :
The initial expression is
[tex]8x+3y=-9-8x+y=29[/tex]Then
[tex]\begin{gathered} \Rightarrow8x+3y=-9-8x+y \\ \Rightarrow16x+2y=-9 \\ \text{and} \\ 8x+3y=29 \\ \Rightarrow8x=29-3y \end{gathered}[/tex]Therefore,
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The initial expression is
[tex]8x+3y=-9-8x+y=29[/tex]Then
[tex]\begin{gathered} \Rightarrow8x+3y=-9-8x+y \\ \Rightarrow16x+2y=-9 \\ \text{and} \\ 8x+3y=29 \\ \Rightarrow8x=29-3y \end{gathered}[/tex]Therefore,
[tex]undefined[/tex]