2x - 1 = x + A - 1
把 x = 3 代入得:
6 - 1 = 3 + A - 1
A = 3
把 A = 3 代入原方程得:
2x - 1 = x + 3 - 3
2x -1 = x
2x - x = 1
x = 1
所以这个方程的正确解是 x = 1
2x - 1 = x + A - 1
把 x = 3 代入得:
6 - 1 = 3 + A - 1
A = 3
把 A = 3 代入原方程得:
2x - 1 = x + 3 - 3
2x -1 = x
2x - x = 1
x = 1
所以这个方程的正确解是 x = 1