$$ \begin{aligned} 4x+2+x &= 7+2x-2&& \text{simplify left and right hand side} \\[1 em]5x+2 &= 2x+5&& \text{move the $ \color{blue}{ 2x } $ to the left side and $ \color{blue}{ 2 }$ to the right} \\[1 em]5x-2x &= 5-2&& \text{simplify left and right hand side} \\[1 em]3x &= 3&& \text{ divide both sides by $ 3 $ } \\[1 em]x &= \frac{3}{3}&& \\[1 em]x &= 1&& \\[1 em] \end{aligned} $$

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