Answer:
3x-4
Step-by-step explanation:
Inside of the parenthesis, it cannot be further simplified, so we moe to distributing.
=-6x+9x-4
Combine like terms
=3x-4
cannot be further simplified on its own
[tex]\huge\boxed{-6x-(-9x+4)=3x-4}[/tex]
[tex]-6x-(-9x+4)=-6x-1(-9x+4)\\\\\text{Use the distributive property}\ a(b+c)=ab+ac\\\\=-6x+(-1)(-9x)+(-1)(4)\\\\=-6x+9x-4\qquad\text{combine like terms}\\\\=(-6x+9x)-4=3x-4[/tex]
