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

Toán Lớp 9: giải pt: x+1 / 2018 – x + 2 / 2017 = x+3 / 2016 +1

Toán Lớp 9: giải pt: x+1 / 2018 – x + 2 / 2017 = x+3 / 2016 +1

Comments ( 2 )

  1. \frac{x+1}{2018}-\frac{x+2}{2017}=\frac{x+3}{2016}+1
    <=>\frac{x+1}{2018}+1-\frac{x+2}{2017}-1=\frac{x+3+2016}{2016}
    <=>\frac{x+1+2018}{2018}-\frac{x+2+2017}{2017}=\frac{x+2019}{2016}
    <=>\frac{x+2019}{2018}-\frac{x+2+2017}{2017}-\frac{x+2019}{2016}=0
    <=>(x+2019)(1/2018-1/2017-1/2016)=0
    =>x+2019=0(Vì 1/2018-1/2017-1/2016\ne0)
    <=>x=-2019
    Vậy S={-2019}

  2. Giải đáp + Lời giải và giải thích chi tiết:
     

    toan-lop-9-giai-pt-1-2018-2-2017-3-2016-1

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

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