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

Toán Lớp 6: (7^3+5^2).x+(7^3-5^2).x-10^3=372

Toán Lớp 6: (7^3+5^2).x+(7^3-5^2).x-10^3=372

Comments ( 2 )

  1. Giải đáp+Lời giải và giải thích chi tiết:
    (7^3+5^2).x+(7^3-5^2).x-10^3=372
    =>(343+25).x+(343-25).x-10000=372
    =>368.x+318.x-10000=372
    =>368.x+318.x=372+1000
    =>368.x+318.x=1372
    =>(368+318).x=1372
    =>686.x=1372
    =>      x=1372:686
    =>      x=2
    Vậy x=2

  2. (7^3 + 5^2)x + (7^3 – 5^2)x – 10^3 = 372
    => (343 + 25)x + (343 – 25)x – 1000 = 372
    => 368x + 318x = 372 + 1000
    => 686x = 1372
    => x = 1372 : 686
    => x = 2
    Vậy x = 2

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

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