$$9x-4-3(x-4)=4(x-1)$$
$x=-6$
$$9x-4-3x+12=4\left(x-1\right)$$
$$6x-4+12=4\left(x-1\right)$$
$$6x+8=4\left(x-1\right)$$
$$6x+8=4x-4$$
$$6x+8-4x=-4$$
$$2x+8=-4$$
$$2x=-4-8$$
$$2x=-12$$
$$x=\frac{-12}{2}$$
$$x=-6$$
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