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

Toán Lớp 6: a;17-3.x=2 b;5x-1=31+2.(-3)

Toán Lớp 6: a;17-3.x=2 b;5x-1=31+2.(-3)

Comments ( 2 )

  1. $\text{Giải đáp + Lời giải và giải thích chi tiết:}$
    $\text{a, 17 -3x=2}$
    $\text{        -3x = 2 – 17 }$
    $\text{       -3x = -15}$
    $\text{          x = 5}$
    $\text{b , 5x -1 = 31+ 2.(-3)}$
    $\text{    5x -1 = 25 }$
    $\text{    5x      = 26}$
    $\text{     x       = }$$\frac{26}{5}$
    $\text{    x        = 5,2 }$

  2. $@Zeng$
    a)17-3.x=2
    3x=17-2
    3x=15
    x=15:3
    x=5
    Vậy x=5
    b)5x-1=31+2.(-3)
    5x-1=31+(-6)
    5x-1=25
    5x=25+1
    5x=26
    x=26:5
    x=26/5=5,2
    Vậy x=5,2
     

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