Question

I need help with 3 answers

Answer 1

$\begin{gathered} 8x-2=-9+7x \\ 8x-7x=-9+2 \\ x=-7 \end{gathered}$

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$\begin{gathered} a+5=-5a+5 \\ a+5a=5-5 \\ 6a=0 \\ a=\frac{0}{6} \\ a=0 \end{gathered}$

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$\begin{gathered} 4m-4=4m \\ 4m-4m=4 \\ 0=4 \end{gathered}$