$$7 x - 3 ( 9 x + 4 ) = 9 ( - x - 1 ) + x$$
$x=-\frac{1}{4}=-0.25$
$$7x-27x-12=9\left(-x-1\right)+x$$
$$-20x-12=9\left(-x-1\right)+x$$
$$-20x-12=9\left(-x\right)-9+x$$
$$-20x-12-9\left(-x\right)=-9+x$$
$$-20x-12-9\left(-x\right)-x=-9$$
$$-20x-12-9\left(-1\right)x-x=-9$$
$$-20x-12+9x-x=-9$$
$$-11x-12-x=-9$$
$$-12x-12=-9$$
$$-12x=-9+12$$
$$-12x=3$$
$$x=\frac{3}{-12}$$
$$x=-\frac{1}{4}$$
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