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

Toán Lớp 5: tìm x: 3x(12-4x)-4x(9-3x)=30 easy nha

Toán Lớp 5: tìm x: 3x(12-4x)-4x(9-3x)=30
easy nha

Comments ( 2 )

  1. 3x (12- 4x )-4x (9- 3x )=30
    ⇔36x- 12x 2-36x +12x 2= 30
     xin ctlhn cho nhóm ạ

  2. 3x(12-4x)-4x(9-3x)=30
    ⇔36x-12x^2-36x+12x^2=30
    ⇔(36x-36x)-(12x^2-12x^2)=30
    ⇔0=30
    Vậy không có giá trị x thoả mãn

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