$$ \begin{aligned} 4(x-1)+4(x+9) &= 4x+11(x+8)&& \text{simplify left and right hand side} \\[1 em]4x-4+4x+36 &= 4x+11x+88&& \\[1 em]8x+32 &= 15x+88&& \text{move the $ \color{blue}{ 15x } $ to the left side and $ \color{blue}{ 32 }$ to the right} \\[1 em]8x-15x &= 88-32&& \text{simplify left and right hand side} \\[1 em]-7x &= 56&& \text{ divide both sides by $ -7 $ } \\[1 em]x &= -\frac{56}{7}&& \\[1 em]x &= -8&& \\[1 em] \end{aligned} $$

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