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

Toán Lớp 6: tìm x 210-5 ( x -10)=200 (x+2)^3-12=15 cần gấp ạ

Toán Lớp 6: tìm x
210-5 ( x -10)=200
(x+2)^3-12=15
cần gấp ạ

Comments ( 2 )

  1. Lời giải và giải thích chi tiết:
    210 – 5(x – 10) = 200
    => 5(x – 10) = 10
    => x – 10 = 2
    => x = 12
    (x + 2)^3 – 12 = 15
    => (x + 2)^3 = 27
    => x + 2 = 3
    => x = 1

  2. 210 – 5 ( x – 10 ) = 200
    5( x – 10 ) = 210 – 200
    5( x – 10 ) = 10
    x – 10 = 10 : 5
    x – 10 = 2
    x = 2 + 10
    x = 12
    – Vậy x = 12
    b) ( x + 2 )^3 – 12 = 15
    ( x + 2 )^3 = 15 + 12
    ( x + 2 )^3 = 27
    ( x + 2 )^3 = 3^3
    x + 2 = 3
    x = 3 – 2
    x = 1
    – Vậy x = 1
    @Rin

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