Question 919412

{{{ -3(x-4)=-4x}}}

you came up with {{{-3x+12=-4x}}} which is correct

now move {{{-4x}}} to the left adding {{{4x}}}to both sedes of equation

{{{-3x+4x+12=-4x+4x}}}

{{{x+12=-cross(4x)+cross(4x)}}}

{{{x+12=0}}}

{{{x+12-12=0-12}}}

{{{x=-12}}}