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

Toán Lớp 6: Tìm x nguyên 20 –[42+ (x –6)] = 90

Toán Lớp 6: Tìm x nguyên
20 –[42+ (x –6)] = 90

Comments ( 2 )

  1. Giải đáp:
    20 –[42+ (x –6)] = 90
     => 42+ (x –6)= 20-90
    => x-6= -70-42
    => x-6=-112
    => x=-106
    Vậy x=-106

  2. 20 – [42 + ( x – 6 )] = 90
    => 42 + ( x – 6 ) = 20 – 90
    => 42 + ( x – 6 ) = -70
    => x – 6 = (-70) – 42
    => x – 6 = -112
    => x = (-112) + 6
    => x = -106
    Vậy x = -106
    #dtkc

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