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

Toán Lớp 7: 2(x-1)-5(x+2)+M=3x-1 bằng bao nhiêu

Tháng Hai 7, 2023 Toán học 2 Comments 0 views

Toán Lớp 7: 2(x-1)-5(x+2)+M=3x-1 bằng bao nhiêu

Comments ( 2 )

  1. landinhngoc97
    landinhngoc97
    7 Tháng Hai, 2023 at 8:22 sáng
    Reply
    2(x-1) – 5(x+2) + M= 3x-1
    => 2x – 2 – 5x – 10 + M= 3x-1
    => (2x -5x) – (2+10) + M= 3x-1
    => -3x – 12 + M= 3x-1
    => M= 3x-1 + 3x + 12
    => M = (3x+3x) – (1-12)
    => M= 6x +11
    Vậy M= 6x + 11
     

  2. kimlien
    kimlien
    7 Tháng Hai, 2023 at 8:22 sáng
    Reply
    2(x-1)-5(x+2)+M=3x-1
    \to 2x-2-5x-10+M=3x-1
    \to (2x-5x)+(-2-10)+M=3x-1
    \to -3x-12+M=3x-1
    \to M=3x-1+3x+12
    \to M=6x+11
    Vậy M=6x+11
     

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

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