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

Toán Lớp 6: 5.(12+2x)-6 mũ 2= 8 mũ 2 tìm x

Toán Lớp 6: 5.(12+2x)-6 mũ 2= 8 mũ 2
tìm x

Comments ( 2 )

  1. #huy
    5.(12+2x)-6^2= 8^2
    =>5.(12+2x)-36=64
    =>5.(12+2x)=64+36=100
    =>12+2x=100:5=20
    =>2x=20-12=8
    =>x=8:2
    =>x=4
    Vậy x=4
     

  2. Lời giải và giải thích chi tiết:
    5(12 + 2x) – 6^2 = 8^2
    => 5(12 + 2x) – 36 = 64
    => 5(12 + 2x) = 64 + 36
    => 5(12 + 2x) = 100
    => 12 + 2x = 20
    => 2x = 8
    => x = 4
    Vậy  x = 4

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