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

Toán Lớp 7: 3x-2/4=4x+5/5 giúp mik vs ạ plsssssssss

Toán Lớp 7: 3x-2/4=4x+5/5 giúp mik vs ạ
plsssssssss

Comments ( 2 )

  1. 3x-2/4=4x+5/5
    ⇒3x-4x=5/5+2/4
    ⇒-x=1+2/4
    ⇒-x=3/2
    ⇒x=-3/2
    Vậy x=-3/2
     

  2. 3x – 2/4 = 4x + 5/5
    => 3x – 1/2 – (4x + 1) = 0
    => 3x – 1/2 – 4x – 1 = 0
    => (3x – 4x) – (1/2 + 2/2) = 0
    => -x – 3/2 = 0
    => -x = 0 + 3/2
    => -x = 3/2
    => x = -3/2

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

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