Question

tìm x biết

/ 2x - 4 / + 1 = 5

Answer 1

\(|2x-4|+1=5\)

\(|2x-4|=5-1\)

\(|2x-4|=4\)

\(\Rightarrow2x-4=\pm4\)

\(\Rightarrow\left\{{}\begin{matrix}2x-4=4\\2x-4=-4\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}2x=8\\2x=0\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}x=4\\x=0\end{matrix}\right.\)

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Answer 2

( 2x-4 )+1=5

<->2x-4=5-1

<->2x-4=4

<->2x=8

<->x=4

Answer 3

\(\left|2x-4\right|+1=5\)

\(\Rightarrow\left|2x-4\right|=5-1\)

\(\Rightarrow\left|2x-4\right|=4\)

\(\Rightarrow\)\(\left[{}\begin{matrix}2x-4=4\\2x-4=-4\end{matrix}\right.\)

\(\Rightarrow\)\(\left[{}\begin{matrix}2x=4+4\\2x=-4+4\end{matrix}\right.\)

\(\Rightarrow\)\(\left[{}\begin{matrix}2x=8\\2x=0\end{matrix}\right.\)

\(\Rightarrow\)\(\left[{}\begin{matrix}x=4\\x=0\end{matrix}\right.\)

Answer 4

nguyễn ly

Tìm x:

\(\left|2x-4\right|+1=5\)

\(\Rightarrow\left|2x-4\right|=4\)

\(\Rightarrow\left[{}\begin{matrix}2x-4=4\\2x-4=-4\end{matrix}\right.\)

\(\Rightarrow\left[{}\begin{matrix}2x=4+4\Rightarrow2x=8\Rightarrow x=\dfrac{8}{2}=4\\2x=\left(-4\right)+4\Rightarrow2x=0\Rightarrow x=0\end{matrix}\right.\)

Vậy x = 4 và x = 0