Answer :

[tex]-8x-(3x+6)=4-x\\ -8x-3x-6=4-x\\ -10x=10\\ x=-1[/tex]
naǫ
[tex]-8x-(3x+6)=4-x \\ -8x-3x-6=4-x \\ -11x-6=4-x \\ -11x+x=4+6 \\ -10x=10 \\ \underline{\underline{x=-1}}[/tex]