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

Toán Lớp 7: 1,`|1/6-x|=|2x-1|` `2)| 3x+ 1| = | 5x-6|`

Tháng Bảy 15, 2022 Toán học 1 Comment 0 views

Toán Lớp 7: 1,|1/6-x|=|2x-1|
2)| 3x+ 1| = | 5x-6|

Comments ( 1 )

  1. tongtung
    tongtung
    15 Tháng Bảy, 2022 at 2:41 sáng
    Reply
    $\\$
    1,
    |1/6 – x|=|2x-1|
    TH1 :
    1/6 – x = 2x-1
    -> -x – 2x=(-1)/6 -1
    -> -3x=(-7)/6
    ->x=7/18
    TH2 :
    1/6  -x=-2x+1
    -> -x+2x=(-1)/6 +1
    ->x=5/6
    Vậy x=7/18, x=5/6
    2,
    |3x+1|=|5x-6|
    TH1 :
    3x+1=5x-6
    ->3x-5x=-1-6
    -> -2x=-7
    ->x=7/2
    TH2 :
    3x+1=-5x+6
    ->3x+5x=-1+6
    -> 8x=5
    ->x=5/8
    Vậy x=7/2, x=5/8
     

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

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