Răspuns:
V3x+1=1+V3x-8 <=> 3x+1=1+2V3x-8 +3x-8 <=> 0=2V3x-8 -8 <=> -2V3x-8=-8 <=> V3x-8=4 <=> 3x-8=16 <=> 3x=24 <=> x=8