∵|3x+2y-6|/√(9+4)=|6x+4y-3|/√(36+16)
∴(3x+2y-6)²=(6x+4y-3)²/4
(6x+4y-12)²=(6x+4y-3)²
(12x+8y-15)(-9)=0
∴动点轨迹方程为:12x+8y-15=0