|4x-3y+2|/√(4^2+3^2)=|12x+5y-22|/√(12^2+5^2),
(4x-3y+2)/5=(12x+5y-22)/13,x+8y-17=0;
或(4x-3y+2)/5=-(12x+5y-22)/13,-8x+y+6=0．