Question
$$-12-(-3)-(-16) = 0$$
Answer
This equation has no solution.
Explanation
$$ \begin{aligned} -12-(-3)-(-16) &= 0&& \text{simplify left side} \\[1 em]-12-(-3)-(-16) &= 0&& \\[1 em]7 &= 0&& \\[1 em] \end{aligned} $$
Since the statement $ \color{red}{ 7 = 0 } $ is FALSE, we conclude that the equation has no solution.
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