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

Toán Lớp 6: 3^x . 2 + 15 =33 giúp mik nhé. mik cảm ơn

Toán Lớp 6: 3^x . 2 + 15 =33
giúp mik nhé. mik cảm ơn

Comments ( 2 )

  1. $3^{x}$ . 2 + 15 = 33
    $3^{x}$ . 2 = 33 – 15
    $3^{x}$ . 2 = 18
    $3^{x}$ = 18 : 2
    $3^{x}$ = 9
    $3^{x}$ = $3^{2}$ 
    –> x = 2.
    xin hay nhất ạ <33

  2. Answer
    3^{x} . 2 + 15 = 33
    $\Rightarrow$ 3^{x} . 2 = 33 – 15
    $\Rightarrow$ 3^{x} . 2 = 18
    $\Rightarrow$ 3^{x} = 18 : 2
    $\Rightarrow$ 3^{x} = 9
    $\Rightarrow$ 3^{x} = 3^{2}
    $\Rightarrow$ x = 2
    $\text{Vậy}$ x = 2

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

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