Answer :

naǫ
[tex]y=3x-4 \\ 9x-3y=14 \\ \\ \hbox{substitute 3x-4 for y in the 2nd equation:} \\ 9x-3(3x-4)=14 \\ 9x-9x+12=14 \\ 12=14 \\ not \ true \\ \\ \boxed{\hbox{no solution}}[/tex]