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

Toán Lớp 7: (3/4.x-1/2).(0,25.x+4/3)=0 Lm chi tiết ạ

Toán Lớp 7: (3/4.x-1/2).(0,25.x+4/3)=0
Lm chi tiết ạ

Comments ( 2 )

  1. ( 3/4 . x – 1/2) . ( 0,25 . x  + 4/3) = 0
    ⇒ +) Trường hợp 1 :
    3/4 . x – 1/2 = 0
    3/4 . x = 0 + 1/2
    3/4 . x = 1/2
    x = 1/2 : 3/4
    x= 2/3
    +) Trường hợp 2 :
    0,25 . x + 4/3 = 0
    1/4 . x + 4/3 = 0
    1/4 . x = 0 – 4/3
    1/4 . x = -4/3
    x = -4/3 : 1/4
    x= -16/3
    Vậy x ∈ { 2/3 ; -16/3}

  2. Đáp án:
     
    Giải thích các bước giải:
     

    toan-lop-7-3-4-1-2-0-25-4-3-0-lm-chi-tiet-a

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

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