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

Toán Lớp 7: giúp em với `: |3 – 2x| – 2x = 5,3`

Toán Lớp 7: giúp em với : |3 – 2x| – 2x = 5,3

Comments ( 1 )

  1. $|3-2x|-2x=5,3$
    $⇔ |3-2x|=2x+5,3$
    $⇔ \left[ \begin{array}{l}3-2x=2x+5,3\\3-2x=-2x-5,3\end{array} \right.$
    $⇔ \left[ \begin{array}{l}4x=-1,7\\0x=8,3\end{array} \right.$
    $⇒ x=-\dfrac{1,7}{4}$
     

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

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