Question 344442
{{{(3n-4)/(4n-3n)=-1}}}
As written it won't equal {{{-1}}}.
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Unless you made a mistake in the numerator and it should be 
{{{(3n-4n)/(4n-3n)=-1}}}
Because,
{{{3n-4n=-n}}}
and 
{{{4n-3n=n}}}
So then
{{{(3n-4n)/(4n-3n)=n/(-n)=-1}}}