$$ \begin{aligned} 4x+6 &= -5+2x+17&& \text{simplify right side} \\[1 em]4x+6 &= 2x+12&& \text{move the $ \color{blue}{ 2x } $ to the left side and $ \color{blue}{ 6 }$ to the right} \\[1 em]4x-2x &= 12-6&& \text{simplify left and right hand side} \\[1 em]2x &= 6&& \text{ divide both sides by $ 2 $ } \\[1 em]x &= \frac{6}{2}&& \\[1 em]x &= 3&& \\[1 em] \end{aligned} $$

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