$$ \begin{aligned} 3(x+2) &= 5x+10&& \text{simplify left side} \\[1 em]3x+6 &= 5x+10&& \text{move the $ \color{blue}{ 5x } $ to the left side and $ \color{blue}{ 6 }$ to the right} \\[1 em]3x-5x &= 10-6&& \text{simplify left and right hand side} \\[1 em]-2x &= 4&& \text{ divide both sides by $ -2 $ } \\[1 em]x &= -\frac{4}{2}&& \\[1 em]x &= -2&& \\[1 em] \end{aligned} $$

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