2x+5-(3x-12)/3

2x+5-3x+12/3 = -1x+17/3 = -1/3x + 17/3

2x+5-(3x-12)/3 2x+5-3x+12/3 -x+17/3 /*3 -3x+51 -3x=-51 /:(-3) x=17

2x+5-(3x-12)/3= 2x+5-3x+12/3=2x+5-3x+4=-x+9