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

Toán Lớp 7: |x|- 2,3=4,5 = x=+-1,7 x= 4,5+2,3

Toán Lớp 7: |x|- 2,3=4,5 = x=+-1,7 x= 4,5+2,3

Comments ( 2 )

  1. Answer
    |x| – 2,3 = 4,5
    => |x| = 4,5 + 2,3
    => |x| = 6,8
    => $\left[\begin{matrix} x=6,8\\ x=-6,8\end{matrix}\right.$
    $\text{Vậy}$ x \in {6,8 ; -6,8}

  2. |x|-2,3=4,5
    |x|=4,5+2,3
    |x|=6,8
    =>x=+-6,8
    —–
    x=+-1,7 ?
    —–
    x=4,5+2,3
    x=6,8

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

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