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

Toán Lớp 6: Tìm x: (x+2)^3=(2x)^3 Mk cần gấp

Toán Lớp 6: Tìm x:
(x+2)^3=(2x)^3
Mk cần gấp

Comments ( 2 )

  1. $(x+2)^3=(2x)^3$
    $⇔ x+2=2x$
    $⇔ -x+2=0$
    $⇔ -x=-2$
    $⇔ x=2$

  2. (x+2)^3=(2x)^3
    <=>x+2=2x
    <=>x+2-2x=0
    <=>-x+2=0
    <=>-x=-2
    =>x=2

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