Question
$$x+3 = x+6$$
Answer
This equation has no solution.
Explanation
$$ \begin{aligned} x+3 &= x+6&& \text{move the $ \color{blue}{ x } $ to the left side and $ \color{blue}{ 3 }$ to the right} \\[1 em]x-x &= 6-3&& \text{simplify left and right hand side} \\[1 em]x-x &= 3&& \\[1 em]0 &= 3&& \\[1 em] \end{aligned} $$
Since the statement $ \color{red}{ 0 = 3 } $ is FALSE, we conclude that the equation has no solution.
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