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[tex] - \frac{2}{5} x - 1 = 9 \\ [/tex]
Add sides 1
[tex] - \frac{2}{5} x - 1 + 1 = 9 + 1 \\ [/tex]
[tex] - \frac{2}{5} x = 10 \\ [/tex]
Multiply sides by 5
[tex]5 \times - \frac{2}{5}x =5 \times 10 \\ [/tex]
[tex] - 2x = 50[/tex]
Divide sides by - 2
[tex] \frac{ - 2x}{ - 2} = \frac{50}{ - 2} \\ [/tex]
[tex]x = - 25[/tex]
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