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

Toán Lớp 6: `3x – (1/6 – 1/2x) = -1 2/3` Nhanh nha nhanh

Toán Lớp 6: 3x – (1/6 – 1/2x) = -1 2/3
Nhanh nha nhanh

Comments ( 2 )

  1. Giải đáp:
    $\\$
    3x – (1/6 – 1/2x) = -1 2/3
    -> 3x- 1/6 + 1/2x = (-5)/3
    -> (3x+1/2x) – 1/6 = (-5)/3
    -> (3+ 1/2)x – 1/6 =(-5)/3
    -> (6/2 + 1/2)x – 1/6=(-5)/3
    -> 7/2x-1/6=(-5)/3
    ->7/2x=(-5)/3 + 1/6
    ->7/2x = (-10)/6+1/6
    -> 7/2x=(-9)/6
    ->x=(-9)/6 : 7/2
    ->x=(-9)/6 . 2/7
    ->x=(-3)/7
    Vậy x=(-3)/7
     

  2. 3x-(1/6-1/2x)=-1 2/3
    3x-1/6+1/2x=-5/3
    (3x+1/2x)-1/6=-5/3
    x(3+1/2)=-5/3+1/6
    7/2 x=-3/2
    x=-3/2:7/2
    x=-3/7
    vậy x=-3/7
     

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

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