Answer :
[tex]3x-4=-8x-15[/tex]
then
[tex]3x+8x=-15+4[/tex][tex]11x=-11\Rightarrow x=-1[/tex]the final answer is x=-11
then
[tex]3x+8x=-15+4[/tex][tex]11x=-11\Rightarrow x=-1[/tex]the final answer is x=-11