X-10X+64=19
-9X+64=19
-9X=19-64
-9X=-45
X=53y=4x-6?��ʲô����ʲô3y-4x=-6 3y=-6+4x y=-2+4/3x26/3x=-16x=？26/3x=-16x(26/3+16)x=052/3x=0x=0抱歉晚了些