Question 222842
What she meant by "the answer is -6" is that the value of {{{n=-6}}} satisfies the equation {{{12-6=-n}}}. Take note that the left side is simply 6 (since 12-6=6). So the equation then becomes {{{6=-n}}}. Now plug in {{{n=-6}}} to get {{{6=-(-6)}}} and now simplify {{{6=6}}}. Since this is a true equation, this verifies the answer.



Note: none of this means that {{{12-6=-6}}} (since this isn't even true anyway).