Question
$$2x-4+x = 5+2x$$
Answer
$$ x = 9 $$
Explanation
$$ \begin{aligned} 2x-4+x &= 5+2x&& \text{simplify left and right hand side} \\[1 em]3x-4 &= 2x+5&& \text{move the $ \color{blue}{ 2x } $ to the left side and $ \color{blue}{ -4 }$ to the right} \\[1 em]3x-2x &= 5+4&& \text{simplify left and right hand side} \\[1 em]x &= 9&& \\[1 em]x &= 9&& \\[1 em] \end{aligned} $$
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