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

Toán Lớp 6: 5 mũ x + 5- 2021 mũ 0= 2 mũ 3x 3

Toán Lớp 6: 5 mũ x + 5- 2021 mũ 0= 2 mũ 3x 3

Comments ( 1 )

  1. 5^x + 5 – 2021^0 = 2^3 . 3
    => 5^x + 5 – 1 = 8 . 3
    => 5^x + 5 – 1 = 24
    => 5^x + 5 = 24 + 1
    => 5^x + 5 = 25
    => 5^x + 5^1 = 5^2
    => 5^x = 5^2 – 5^1
    => 5^x = 20
    => Không có giá trị x thỏa mãn.

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

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