$$ \begin{aligned} -11 &= 4-x-4x&& \text{simplify right side} \\[1 em]-11 &= -5x+4&& \text{ swap the left and right side of the equation } \\[1 em]-5x+4 &= -11&& \text{ move 4 to the right } \\[1 em]-5x &= -11-4&& \\[1 em]-5x &= -15&& \text{ divide both sides by $ -5 $ } \\[1 em]x &= \frac{-15}{-5}&& \\[1 em]x &= 3&& \\[1 em] \end{aligned} $$

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