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

Toán Lớp 6: Tìm x: 3x + 2 = 7 9x – 8 = 14 10x : 3 = 6

Toán Lớp 6: Tìm x: 3x + 2 = 7
9x – 8 = 14
10x : 3 = 6

Comments ( 2 )

  1. Trình bày lời giải:
    a)
    3x+2=7
    =>3x=7-2
    =>3x=5
    =>x=5/3
    Vậy x=5/3
    b)
    9x-8=14
    =>9x=14+8
    =>9x=22
    =>x=22/9
    Vậy x=22/9
    c)
    10x:3=6
    =>10x=6.3
    =>10x=18
    =>x=18/10
    =>x=9/5
    Vậy x=9/5

  2. 3x + 2 = 7
    => 3x = 7 – 2
    => 3x = 5
    => x = 5 : 3
    => x = 5/3
    Vậy x = 5/3
    $\\$
    9x -8 = 14
    => 9x = 14 + 8
    => 9x = 22
    => x = 22 : 9
    => x = 22/9
    Vậy x = 22/9
    $\\$
    10x : 3 = 6
    => 10x = 6 xx 3
    => 10x = 18
    => x = 18 : 10
    => x = 9/5
    Vậy x = 9/5

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

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