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

Toán Lớp 6: A,125-5(4+x)=15 B,2mũ6+(5+x)=3mũ4

Toán Lớp 6: A,125-5(4+x)=15
B,2mũ6+(5+x)=3mũ4

Comments ( 2 )

  1.  
    Lời giải và giải thích chi tiết:
     a, $125-5(4+x)=15$
    =>5(4+x)=125-15
    =>5(4+x)=110
    =>4+x=110:5
    =>4+x=22
    =>x=22-4
    =>x=18
    Vậy x=18
    b, $2^{6}+(5+x)=3^{4}$
    =>64+(5+x)=81
    =>5+x=81-64
    =>5+x=17
    =>x=17-5
    =>x=12
    Vậy x=12

  2. $\text{#Táo vàng}$
    a, 125 – 5 . (4 + x) = 15
    $\Rightarrow$ 5 . (4 + x) = 125 – 15
    $\Rightarrow$ 5 . (4 + x) = 110
    $\Rightarrow$ (4 + x) = 110 : 5
    $\Rightarrow$ 4 + x = 22
    $\Rightarrow$ x = 22 – 4
    $\Rightarrow$ x = 18
    $\text{Vậy}$ x = 18
    ____________________
    b, 2^{6} + (5 + x) = 3^{4}
    $\Rightarrow$ 64 + (5 + x) = 81
    $\Rightarrow$ (5 + x) = 81 – 64
    $\Rightarrow$ 5 + x = 17
    $\Rightarrow$ x = 17 – 5
    $\Rightarrow$ x = 12
    $\text{Vậy}$ x = 12
     

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