`5-(x-6)=4(3-2x)`

`<=>5-x+6=12-8x`

`<=>11-12=-8x+x`

`<=>-1=-7x`

`<=>x=1/7`

`2x(x+2)^2-8x^2=2(x-2)(x^2+2x+4)`

`<=>2x(x^2+4x+4)-8x^2=2(x^3-8)`

`<=>2x^3+8x^2+8x-8x^2=2x^3-16`

`<=>8x=-16`

`<=>x=-2`

`7-(2x+4)=-(x+4)`

`<=>7-2x-4=-x-4`

`<=>7=2x-x`

`<=>x=7`

`d)(x-2)^3+(3x-1)(3x+1)=(x+1)^3`

`<=>x^3-6x^2+12x-8+9x^2-1=x^3+3x^2+3x+1`

`<=>9x=10`

`<=>x=10/9`

`e)2,3x-2(0,7+2x)=3,6-1,7x`

`<=>4x-1,4-4x=3,6`

`<=>-1,4=3,6(vl)`

`f)4x(1-x)-8=1-(4x^2+3)`

`<=>4x-4x^2-8=1-4x^2-3`

`<=>4x=8-2=6`

`<=>x=6/4=3/2