Question 644004


{{{(3n+4)(n-1)-3n(n+2)=1}}}

{{{(3n^2-3n+4n-4)-3n^2-6n=1}}}

{{{3n^2+n-4-3n^2-6n=1}}}

{{{-5n-4=1}}}

{{{-5n=1+4}}}

{{{-5n=5}}}

{{{n=5/(-5)}}}

{{{n=-1}}}