点m(3,-2x+y)与点(x-y,4)关于x轴对称则x= y=
问题描述:
点m(3,-2x+y)与点(x-y,4)关于x轴对称则x= y=
答
关于x轴对称
x坐标相等,y坐标相反
3 = x-y
-2x+y = -4
解得x = 1,y= -2