Question
$$3x+5 = 2(2x+4)$$
Answer
$$ x = -3 $$
Explanation
$$ \begin{aligned} 3x+5 &= 2(2x+4)&& \text{simplify right side} \\[1 em]3x+5 &= 4x+8&& \text{move the $ \color{blue}{ 4x } $ to the left side and $ \color{blue}{ 5 }$ to the right} \\[1 em]3x-4x &= 8-5&& \text{simplify left and right hand side} \\[1 em]-x &= 3&& \text{switch signs on both sides} \\[1 em]x &= -3&& \\[1 em] \end{aligned} $$
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