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

Toán Lớp 7: 0,2:1 1/5 =2/3 :( 6x+7) cái 1 1/5 là hỗn số ý

Toán Lớp 7: 0,2:1 1/5 =2/3 🙁 6x+7)
cái 1 1/5 là hỗn số ý

Comments ( 2 )

  1. 0,2 :  1 và 1/5 = 2/3 : (6x+7)
    0,2  . 5/6 = 2/3 : (6x+7)
    2/3 : (6x+7) = 1/5 .  5/6 = 1/6
    6x + 7 = 2/3 : 1/6 = 2/3 . 6 =4
    6x = 4 – 7 = -3
    x = -3 / 6
    x = -1/2
    Vậy x = -1/2
     

  2. $\\$
    0,2 : 1 1/5 = 2/3 : (6x + 7)
    -> 1/5 : 6/5 = 2/3 : (6x + 7)
    -> 1/6 = 2/3 : (6x + 7)
    -> 6x + 7 = 2/3 : 1/6
    -> 6x + 7=4
    -> 6x = 4-7
    -> 6x=-3
    ->x=-3 : 6
    ->x=(-1)/2
    Vậy x=(-1)/2
     

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

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