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

Toán Lớp 7: a, -3/2 -2x + 3/4 = -2 b, (-2/3.x-3/5).(3/-2 -10/3) = 2/5

Home/ Toán Lớp 7: a, -3/2 -2x + 3/4 = -2 b, (-2/3.x-3/5).(3/-2 -10/3) = 2/5

Toán Lớp 7: a, -3/2 -2x + 3/4 = -2 b, (-2/3.x-3/5).(3/-2 -10/3) = 2/5

Tháng Mười Hai 28, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: a, -3/2 -2x + 3/4 = -2
b, (-2/3.x-3/5).(3/-2 -10/3) = 2/5

Comments ( 2 )

  1. ngochuong2k2
    ngochuong2k2
    28 Tháng Mười Hai, 2022 at 2:10 chiều
    Reply
    a) -3/2 -2x + 3/4 = -2
    =>-2x+3/4-3/2=-2
    =>-2x-3/4=-2
    =>-2x=-2+3/4
    =>-2x=-5/4
    =>x=5/8
    Vậy x=5/8
    b) (-2/3xxx-3/5)xx(3/-2 -10/3) = 2/5
    =>(-2/3x-3/5)xx-29/6=2/5
    =>-2/3x-3/5=2/5:(-29/6)
    =>-2/3x-3/5=-12/145
    =>-2/3x=15/29
    =>x=-45/58
    Vậy x=-45/58

  2. maianhnhiquynh
    maianhnhiquynh
    28 Tháng Mười Hai, 2022 at 2:10 chiều
    Reply
    a) -3/2 – 2x + 3/4 = -2
    -3/2 – 2x = -2 – 3/4
    -3/2 – 2x = -11/4
    2x = -3/2 – (-11/4)
    2x = 5/4
    x = 5/4 : 2
    x = 5/8
    Vậy x = 5/8
    b) ( -2/3 . x – 3/5) . ( 3/(-2) – 10/3) = 2/5
    ( -2/3 . x – 3/5) . (-29/6) = 2/5
    ( -2/3 . x – 3/5) = 2/5 : (-29/6)
    -2/3 . x – 3/5 = -12/145
    -2/3 . x = -12/145 + 3/5
    -2/3 , x = 15/29
    x = 15/29 : (-2/3)
    x= -45/58
    Vậy x = -45/58

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

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