Choice A. Work done below: 4x-1=5x-8 ( Set the opposite sides equal to each other). 4x-5x-1=-8 (Subtract 5x on both sides) -x-1=-8 (Combine like terms) -x=-8+1( Add 1 on both sides) -x=-7 (Now since you have a negative sign on both sides you can cancel them) x=7 ( Making that as your answer!!)