Question
$$23\cdot6 = 20\cdot3+3\cdot6$$
Answer
This equation has no solution.
Explanation
$$ \begin{aligned} 23\cdot6 &= 20\cdot3+3\cdot6&& \text{simplify left and right hand side} \\[1 em]138 &= 60+18&& \\[1 em]138 &= 78&& \\[1 em] \end{aligned} $$
Since the statement $ \color{red}{ 138 = 78 } $ is FALSE, we conclude that the equation has no solution.
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