Question
$$4x-9 = 11+6x$$
Answer
$$ x = -10 $$
Explanation
$$ \begin{aligned} 4x-9 &= 11+6x&& \text{move the $ \color{blue}{ 6x } $ to the left side and $ \color{blue}{ -9 }$ to the right} \\[1 em]4x-6x &= 11+9&& \text{simplify left and right hand side} \\[1 em]-2x &= 20&& \text{ divide both sides by $ -2 $ } \\[1 em]x &= -\frac{20}{2}&& \\[1 em]x &= -10&& \\[1 em] \end{aligned} $$
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