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

Toán Lớp 6: 2 ( 3x -1 ) + 5 = 4x – 5 7- ( 5-2x ) = 3x + 1

Toán Lớp 6: 2 ( 3x -1 ) + 5 = 4x – 5
7- ( 5-2x ) = 3x + 1

Comments ( 2 )

  1. 2 ( 3x -1 ) + 5 = 4x – 5
    → 6x – 2 + 5 = 4x – 5
    → 6x – 4x = -5 -5 + 2
    → 2x = -8
    → x = -4
    Vậy x=-4
    7- ( 5-2x ) = 3x + 1
    → 7 – 5 + 2x  = 3x + 1
    → 2x – 3x = 1 + 5 – 7
    → -x = -1
    → x = 1
    Vậy x = 1

  2. Giải đáp+Lời giải và giải thích chi tiết:
    $\text{a) 2 ( 3x – 1 ) + 5 = 4x – 5}$
    $\text{= 6x – 2 + 5 = 4x – 5}$
    $\text{= 6x – 4x = – 5 + 2 – 5}$
    $\text{= 2x = – 8}$
    $\text{= x = – 4}$
    $\text{Vậy x = – 4}$
    $\text{b) 7 – ( 5 – 2x ) = 3x + 1}$
    $\text{= 7 – 5 + 2x = 3x + 1}$
    $\text{= 2x – 3x = 1 – 7 + 5}$
    $\text{= – x = – 1}$
    $\text{= x = 1}$
    $#Shi$
    $\text{Xin ctlhn cho nhóm ạ}$

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