Question
$$9x-4 = 8x+8$$
Answer
$$ x = 12 $$
Explanation
$$ \begin{aligned} 9x-4 &= 8x+8&& \text{move the $ \color{blue}{ 8x } $ to the left side and $ \color{blue}{ -4 }$ to the right} \\[1 em]9x-8x &= 8+4&& \text{simplify left and right hand side} \\[1 em]x &= 12&& \\[1 em]x &= 12&& \\[1 em] \end{aligned} $$
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