Question
$$6+3x = 2x+3$$
Answer
$$ x = -3 $$
Explanation
$$ \begin{aligned} 6+3x &= 2x+3&& \text{move the $ \color{blue}{ 2x } $ to the left side and $ \color{blue}{ 6 }$ to the right} \\[1 em]3x-2x &= 3-6&& \text{simplify left and right hand side} \\[1 em]x &= -3&& \\[1 em]x &= -3&& \\[1 em] \end{aligned} $$
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