Question
$$4x-13 = 2x+9$$
Answer
$$ x = 11 $$
Explanation
$$ \begin{aligned} 4x-13 &= 2x+9&& \text{move the $ \color{blue}{ 2x } $ to the left side and $ \color{blue}{ -13 }$ to the right} \\[1 em]4x-2x &= 9+13&& \text{simplify left and right hand side} \\[1 em]2x &= 22&& \text{ divide both sides by $ 2 $ } \\[1 em]x &= \frac{22}{2}&& \\[1 em]x &= 11&& \\[1 em] \end{aligned} $$
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