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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 7: lx+1/4l=3/4-l-1/2l giúp mik vss

Tháng Chín 2, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: lx+1/4l=3/4-l-1/2l giúp mik vss

Comments ( 2 )

  1. catlantuong
    catlantuong
    2 Tháng Chín, 2022 at 3:08 sáng
    Reply
    Answer
    |x + 1/4| = 3/4 – |-1/2|
    $\Rightarrow$ |x + 1/4| = 3/4 – 1/2
    $\Rightarrow$ |x + 1/4| = 1/4
    $\Rightarrow$ $\left[\begin{matrix} x+\dfrac{1}{4}=\dfrac{1}{4}\\ x+\dfrac{1}{4}=\dfrac{-1}{4}\end{matrix}\right.$ 
    $\Rightarrow$ $\left[\begin{matrix} x=\dfrac{1}{4}-\dfrac{1}{4}\\ x=\dfrac{-1}{4}-\dfrac{1}{4}\end{matrix}\right.$ \
    $\Rightarrow$ $\left[\begin{matrix} x=0\\ x=\dfrac{-1}{2}\end{matrix}\right.$ 
    $\text{Vậy}$ x \in {0 ; -1/2}

  2. dananhnhu2k4
    dananhnhu2k4
    2 Tháng Chín, 2022 at 3:08 sáng
    Reply
    |x+1/4|=3/4-|-1/2|
    |x+1/4|=3/4-1/2
    |x+1/4|=1/4
    =>\(\left[ \begin{array}{l}x+1/4=1/4\\x+1/4=-1/4\end{array} \right.\) 
    =>\(\left[ \begin{array}{l}x=0\\x=-1/2\end{array} \right.\) 
    Vậy x \in {0, -1/2}

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222-9+11+12:2*14+14 = ? ( )

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