3x+7=0 13-100x=0 7x-4=x-16 13-5x=8-2x 4y+15=6y+17
3x+7=0 13-100x=0 7x-4=x-16 3x=-7 -100x=-13 7x-x=-16+4 x=-7/3 x=13/100 6x=-12 x=2.3 x=-12/4