过交线的平面族:5x-y+3z-2+kz=0.即 5x-y+(3+k)z-2=0.
与5x-y+3z-2=0垂直.25+1+3(3+k)=0.得到k=-35/3.
代入化简,所求平面为:15x-3y-26z-6=0