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

Toán Lớp 6: Tìm x: (80-5x)×2=2×2×2×2+3×3×3×3-7

Toán Lớp 6: Tìm x:
(80-5x)×2=2×2×2×2+3×3×3×3-7

Comments ( 2 )

  1. (80-5x)xx2=2xx2xx2xx2+3xx3xx3xx3-7
    =>(80-5x)xx2=16+81-7
    =>(80-5x)xx2=90
    =>80-5x=90:2
    =>80-5x=45
    =>5x=80-45
    =>5x=35
    =>x=35:5
    =>x=7
    Vậy x=7

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