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

Toán Lớp 7: Tìm x biết: 0,1(6)+0,(3)/0,(3)+1,1(6) × x=0,(2)

Toán Lớp 7: Tìm x biết:
0,1(6)+0,(3)/0,(3)+1,1(6) × x=0,(2)

Comments ( 2 )

  1. {0,1(6)+0,(3)}/{0,(3)+1,1(6)} × x=0,(2)
    {1/10 .5/3+3/9}/{3/9+1/10 . 35/3} . x=2/9
    {1/10 .5/3+1/3}/{1/3+1/10 . 35/3} . x=2/9
    {1/2}/{3/2} . x=2/9
    1/3 . x=2/9
    x=2/9:1/3
    x=2/3

  2. Giải đáp:
    x=-29/35
    x=13/7
    Lời giải và giải thích chi tiết:
    0,1(6)+(0,(3))/(0,(3))+1,1(6) × x=0,(2)
    1/6 + 1 + 7/6 xx x=1/5
    7/6+7/6xxx=1/5
    7/6.(1+x)=1/5
    1+x=1/5:7/6
    1+x=6/35
    x=6/35-1
    x=-29/35
    Hoặc
    (0,1(6)+0,(3))/(0,(3)+1,1(6) × x)=0,(2)
    (0,5)/(0,(3)+1,1(6)xxx)=0,2
    1/2: (1/3 + 7/6xxx)=1/5
    1/3+ 7/6xxx=1/2:1/5
    1/3+ 7/6xxx=5/2
    7/6xxx=5/2-1/3
    7/6xxx=13/6
    x=13/6:7/6
    x=13/7

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