$$ \begin{aligned} 3x-11+5x &= 4x+25&& \text{simplify left side} \\[1 em]8x-11 &= 4x+25&& \text{move the $ \color{blue}{ 4x } $ to the left side and $ \color{blue}{ -11 }$ to the right} \\[1 em]8x-4x &= 25+11&& \text{simplify left and right hand side} \\[1 em]4x &= 36&& \text{ divide both sides by $ 4 $ } \\[1 em]x &= \frac{36}{4}&& \\[1 em]x &= 9&& \\[1 em] \end{aligned} $$

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