2x+y-3=0 (1)
4x-2y-6=0 (2)
(1)*2+(2)
4x+2y-6+4x-2y-6=0
8x-12=0
x=3/2
所以交点横坐标是3/2
与y轴平行的直线横坐标相同
所以是x=3/2