$$ \begin{aligned} 2x-5 &= 3(4x+5)&& \text{simplify right side} \\[1 em]2x-5 &= 12x+15&& \text{move the $ \color{blue}{ 12x } $ to the left side and $ \color{blue}{ -5 }$ to the right} \\[1 em]2x-12x &= 15+5&& \text{simplify left and right hand side} \\[1 em]-10x &= 20&& \text{ divide both sides by $ -10 $ } \\[1 em]x &= -\frac{20}{10}&& \\[1 em]x &= -2&& \\[1 em] \end{aligned} $$

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