Question
$$20\cdot\frac{1}{6}\cdot7 = 0$$
Answer
This equation has no solution.
Explanation
$$ \begin{aligned} 20\cdot\frac{1}{6}\cdot7 &= 0&& \text{multiply ALL terms by } \color{blue}{ 6 }. \\[1 em]620\cdot\frac{1}{6}\cdot7 &= 6\cdot0&& \text{cancel out the denominators} \\[1 em]140 &= 0&& \\[1 em] \end{aligned} $$
Since the statement $ \color{red}{ 140 = 0 } $ is FALSE, we conclude that the equation has no solution.
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