Answer:
The value of x in the equation is -3.
Step-by-step explanation:
Assuming that you're asking for the value of x.
[tex]x-5x=12[/tex]
[tex]-4x=12[/tex]
[tex]\frac{-4x}{-4}=\frac{12}{-4}[/tex]
[tex]\boxed{\boldsymbol{x=-3}}[/tex]
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