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

Toán Lớp 7: `-1/4-x+|3/5-9/20|=2-(3/5-9/10)` Dễ hiểu nha :V

Toán Lớp 7: -1/4-x+|3/5-9/20|=2-(3/5-9/10)
Dễ hiểu nha :V

Comments ( 2 )

  1. -1/4-x+|3/5-9/20|=2-(3/5-9/10)
    ⇒ -1/4 – x + |3/5 – 9/20| = 2 – 3/5 + 9/10
    ⇒ -1/4 – x + |3/20| = 2 – 3/5 + 9/10
    ⇒ -x – 1/10 = 2 – 3/5 + 9/10
    ⇒ -x – 1/10 = 23/10
    ⇒ -x = 23/10 + 1/10
    ⇒ -x = 12/5
    → x = -12/5
    Cho mình xin hay nhất nha bạn
    @Drew McIntyre

  2. -1/4-x+|3/5-9/(20)|=2-(3/5-9/(10))
    ⇔-1/4-x+|(12)/(20)-9/(20)|=2-(6/(10)-9/(10))
    ⇔-1/4-x+|3/(20)|=2-(-3/(10))
    ⇔-1/4-x+3/(20)=2+3/(10)
    ⇔-5/(20)-x+3/(20)=(20)/(10)+3/(10)
    ⇔-1/(10)-x=(23)/(10)
    ⇔-x=(23)/(10)+1/(10)
    ⇔-x=(12)/(5)
    ⇔x=-(12)/(5)
    Vậy x=-(12)/(5)
     

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

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