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

Toán Lớp 7: /x+3/-16=-4 Giúp mk nhé các bạn

Toán Lớp 7: /x+3/-16=-4
Giúp mk nhé các bạn

Comments ( 2 )

  1. Giải đáp:
         | x + 3| – 16 = -4
    => | x + 3| = -4 + 16
    => | x + 3 | =12
    $\Rightarrow \left[\begin{matrix} x+3=12\\ x+ 3=-12\end{matrix}\right.$
    $\Rightarrow \left[\begin{matrix} x = 12 – 3\\ x=-12 -3\end{matrix}\right.$
    $\Rightarrow \left[\begin{matrix} x = 9\\ x=-15 \end{matrix}\right.$
    S ={ 9 ; -15}
    mong ctlhn ạ ~~

  2. |x+3|-16=-4
    |x+3|=12
    ⇔\(\left[ \begin{array}{l}x+3=12\\x+3=-12\end{array} \right.\) 
    ⇔\(\left[ \begin{array}{l}x=9\\x=-15\end{array} \right.\) 

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