Answer:
[tex] - 8k - 9 \: = 9k - 9 \\ - 8k - 9k = - 9 + 9 \\ \frac{ - 17k}{ - 17} = \frac{0}{17} \\ k = 0 \\ proof \\ - 8(0) - 9 = 9(0) - 9 \\ - 9 = - 9[/tex]
Step-by-step explanation:
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