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

Toán Lớp 7: |5/2 – 1/3| = |7/3 – 5/2| giúp e ạ

Home/ Toán Lớp 7: |5/2 – 1/3| = |7/3 – 5/2| giúp e ạ

Toán Lớp 7: |5/2 – 1/3| = |7/3 – 5/2| giúp e ạ

Tháng Sáu 5, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: |5/2 – 1/3| = |7/3 – 5/2|
giúp e ạ

Comments ( 2 )

  1. hongocha12
    hongocha12
    5 Tháng Sáu, 2022 at 8:43 chiều
    Reply
    |5/2-1/3x|=|7/3-5/2|
    =>|15/6-2/6 x|=|14/6-15/6|
    =>|15/6-2/6 x|=|-1/6|
    +)15/6-2/6 x=1/6
    =>2/6 x=15/6-1/6
    =>2/6 x=14/6
    =>x=14/6 : 2/6
    =>x=7
    +)15/6-2/6 x=-1/6
    =>2/6 x=15/6-(-1/6)
    =>2/6 x=16/6
    =>x=16/6:2/6
    =>x=8
    Vậy x in {7;8}

  2. huyenmi76
    huyenmi76
    5 Tháng Sáu, 2022 at 8:43 chiều
    Reply
    |5/2-1/3x|=|7/3-5/2|
    => |5/2-x/3|=|-1/6|
    => |5/2-x/3|=1/6
    TH1:
    5/2-x/3=1/6
    <=> x/3=5/2-1/6
    <=> x/3=7/3
    <=> x=7
    TH2:
    5/2-x/3=-1/6
    <=> x/3=8/3
    <=> x=8
    Vậy x∈{7;8}

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

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