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

Toán Lớp 6: 7 mũ 2 – ( 13 + 4x) = 5.2 mũ 3

Toán Lớp 6: 7 mũ 2 – ( 13 + 4x) = 5.2 mũ 3

Comments ( 2 )

  1. $\text{7}$$^{2}$ $\textit{− }$$\text{(13 + 4x)= 5.2}$$^{3}$ 
    $\text{36 − 4}$$\textit{x =}$ $\text{40}$
    $\textit{−}$$\text{4}$$\textit{x }$$\text{+ 36 = 40}$
    $\text{4}$$\textit{x= −}$$\text{4}$
    $\textit{x = − }$$\text{1}$
    eech

  2. Giải đáp:
     
    Lời giải và giải thích chi tiết:
    7^2 – ( 13 + 4x) = 5.2³
    ⇔49- ( 13 + 4x) = 5.8
    ⇔13 + 4x = 49-40
    ⇔4x=9-13
    ⇔x=-4:4
    ⇔x=-1

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