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Are #26 & #28 correct? I need help with #27

Are #26 & #28 correct? I need help with #27-example-1
User Adricadar
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27)


\begin{gathered} 6x+13+7x-2=180 \\ 13x+11=180 \\ 13x=180-11 \\ 13x=169 \\ x=(169)/(13) \\ x=13 \end{gathered}
\begin{gathered} m\angle ABC=7x-2 \\ m\angle ABC=7(13)-2 \\ m\angle ABC=91-2 \\ m\angle ABC=89^0 \end{gathered}

User Tummala Dhanvi
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