QUESTION IMAGE
Question
2(2x + 2) = 4x - 4
Step1: 展开括号
$2\times(2x + 2)=4x+4$,原方程变为$4x + 4=4x - 4$。
Step2: 移项
将含$x$的项移到一边,常数项移到另一边,$4x-4x=-4 - 4$。
Step3: 计算
$0=-8$,此等式不成立。
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方程无解。