解方程：x-12=[x-(x-12)]/(x-12)
问题描述：
解方程：x-12=[x-(x-12)]/(x-12)
答
x-12=[x-(x-12)]/(x-12)
(x-12)(x-12)=12
x-12=±2√3
x=12±2√3
经检验x=12±2√3是原方程的解。
答
设y=x-12
y=(y+12-y)/y
=12/y
y²＝12
y=2√3
x-12=2√3
x=12+2√3