因为:把 y = 3代入 ay = -6得:3a = - 6 解得:a = - 2
把 a = - 2代入方程 4(x - a ) = a - (x - 6)得
4(x + 2) = - 2 - x + 6
整理得:5x = - 4
解得:x = - 4/5
因为:把 y = 3代入 ay = -6得:3a = - 6 解得:a = - 2
把 a = - 2代入方程 4(x - a ) = a - (x - 6)得
4(x + 2) = - 2 - x + 6
整理得:5x = - 4
解得:x = - 4/5