Question 595879

x-4{2x-[-3x-(3-x)]}


x-4{2x-[-3x-3+x]}


x-4{2x+3x+3-x}


x-4{4x+3}


x-16x-12


-15x-12



So x-4{2x-[-3x-(3-x)]} = -15x-12 for all values of x.