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

Toán Lớp 7: 3÷(2x)=1/4÷5/3 |x–3/4|–1/2=0

Toán Lớp 7: 3÷(2x)=1/4÷5/3 |x–3/4|–1/2=0

Comments ( 2 )

  1. Giải đáp+Lời giải và giải thích chi tiết:
    3:(2x)=1/4 : 5/3
    3:(2x)=1/4. 3/5
    3:(2x)=3/20
    2x=3: 3/20
    2x=20
    x=20 : 2
    x=10
    ——————————-
    |x-3/4|-1/2=0
    |x-3/4|=1/2
    TH1:
    x-3/4=1/2
    x=1/2+3/4
    x=5/4
    TH2:
    x-3/4=-1/2
    x=-1/2 + 3/4
    x=1/4
    Vậy x=5/4 hoặc x=1/4.

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