Respuesta :

The angles PBC and PBA are supplementary, then it sums 180, so we have the next equation

[tex]\begin{gathered} 5k+12+83=180 \\ 5k=180-83-12 \\ 5k=85 \\ k=\frac{85}{5} \\ k=17 \end{gathered}[/tex]

Then, the answer is C.17

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