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

Toán Lớp 7: -3/7+x=1/3 -5/8+x=(-2/3)^2 13/3:x/4=6:0,3

Toán Lớp 7: -3/7+x=1/3
-5/8+x=(-2/3)^2
13/3:x/4=6:0,3

Comments ( 2 )

  1. Giải đáp: 
     
    Lời giải và giải thích chi tiết:
     

    toan-lop-7-3-7-1-3-5-8-2-3-2-13-3-4-6-0-3

  2. $\#Lynn2007$

    1)
    -3/7+x=1/3
    <=>x=1/3+3/7
    <=>x=16/21.
    \text{Vậy:} x=16/21.
    2)
    -5/8+x=(-2/3)^2
    <=>-5/8+x=4/9
    <=>x=4/9+5/8
    <=>x=77/72.
    \text{Vậy:} x=77/72.
    3) 
    13/3:x/4=6:0,3
    <=>13/3:x/4=20
    <=>x/4=13/3:20
    <=>x/4=13/60
    <=>x=(13.4)/60
    <=>x=13/15.
    \text{Vậy:} x=13/15.
     

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

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