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

Toán Lớp 6: tìm x (1 -2 x) . 5 mũ 4 = 3 . 5 mũ 5

Toán Lớp 6: tìm x
(1 -2 x) . 5 mũ 4 = 3 . 5 mũ 5

Comments ( 2 )

  1. Lời giải chi tiết:
    (1-2x).5^4=3.5^5
    =>1-2x=3.5^5:5^4
    =>1-2x=3.5
    =>1-2x=15
    =>2x=1-15
    =>2x=-14
    =>x=-14:2
    =>x=-7
    Vậy x=-7

  2. (1-2x).5^4= 3.5^5
    (1-2x).625= 3.3125
    (1-2x).625= 9375
    1-2x= 9375:625
    1-2x= 15
    2x= 1-15
    2x= -14
    x= -14:2
    x= -7
    #namOvO
     

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

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