Question
$$28-\frac{4}{2}+10 = 20$$
Answer
This equation has no solution.
Explanation
$$ \begin{aligned} 28-\frac{4}{2}+10 &= 20&& \text{multiply ALL terms by } \color{blue}{ 2 }. \\[1 em]2\cdot28-2\cdot\frac{4}{2}+2\cdot10 &= 2\cdot20&& \text{cancel out the denominators} \\[1 em]56-4+20 &= 40&& \text{simplify left side} \\[1 em]72 &= 40&& \\[1 em] \end{aligned} $$
Since the statement $ \color{red}{ 72 = 40 } $ is FALSE, we conclude that the equation has no solution.
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