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

Toán Lớp 6: bài 2 tìm x a,29-x/21+27-x/23+25-x/25+23-x/27+21-x/29 =-5 b,x-10/30+x-14/43+x-5/95+x-148//8=0

Toán Lớp 6: bài 2 tìm x
a,29-x/21+27-x/23+25-x/25+23-x/27+21-x/29 =-5
b,x-10/30+x-14/43+x-5/95+x-148//8=0

Comments ( 1 )

  1. Giải đáp:
     a)Ta có :$\frac{29-x}{21}$ +1+$\frac{27-x}{23}$ +1+$\frac{25-x}{25}$ +1+$\frac{23-x}{27}$ +1+$\frac{21-x}{29}$ =-5
    <=>(50-x)($\frac{1}{21}$+ $\frac{1}{23}$+$\frac{1}{25}$ +$\frac{1}{27}$+$\frac{1}{29}$)=0
    =>x=50
    b)
    Lời giải và giải thích chi tiết:
     

    toan-lop-6-bai-2-tim-a-29-21-27-23-25-25-23-27-21-29-5-b-10-30-14-43-5-95-148-8-0

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

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