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

Toán Lớp 6: ( 25 – 2x ) mũ 3 : 5 – 3 mũ 2 = 4 mũ hai

Toán Lớp 6: ( 25 – 2x ) mũ 3 : 5 – 3 mũ 2 = 4 mũ hai

Comments ( 2 )

  1. $\text{(25-2x)³:5-3²=4²}$
    $\text{(25-2x)³:5=4²+3²}$
    $\text{(25-2x)³:5=25}$
    $\text{(25-2x)³=25×5}$
    $\text{(25-2x)³=125}$
    $\text{(25-2x)³=5³}$
    $\text{25-2x=5}$
    $\text{-2x=-20}$
    $\text{x=10}$
    $\text{Vậy x=10}$

  2. (25-2x)^3 : 5- 3^2= 4^2
    (25-2x)^3 : 5- 9=16
    (25-2x)^3 : 5= 16+ 9
    (25-2x)^3 : 5= 25
    (25-2x)^3 = 25. 5
    (25-2x)^3 = 125
    (25-2x)^3 = 5^3
    25- 2x = 5
            2x= 25- 5
             2x= 20
                x= 20: 2
                x= 10

    toan-lop-6-25-2-mu-3-5-3-mu-2-4-mu-hai

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