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

Toán Lớp 6: (79-x)-43=-(17-52) -(-x + 13 – 142) + 18=55

Toán Lớp 6: (79-x)-43=-(17-52)
-(-x + 13 – 142) + 18=55

Comments ( 2 )

  1. ( 79 – x) – 43 = – ( 17 – 52 )
    ( 79 – x) – 43 = – (-35)
    ( 79 – x) – 43 = 35
    79 – x = 35 + 43
    79 – x = 78
    x = 79 – 78
    x = 1
    \text{Vậy x = 1}
    ____________________________________________
    – ( – x + 13 – 142) + 18 = 55
    x – 13 + 142 = 55 – 18
    x – 13 + 142 = 37
    x + 129 = 37
    x = 37 – 129
    x = -92
    \text{Vậy x =} – 92
     

  2. ~ gửi bạn ~
    Lời giải và giải thích chi tiết:
    1. (79 – x) – 43 = -(17 – 52)
    => (79 – x) – 43 = -(-35)
    => (79 – x) – 43 = 35
    => 79 – x = 35 + 43
    => 79 – x = 78
    => x= 79 – 78
    => x =1
    Vậy x = 1
    ———————-
    2. -(-x + 13 – 142) + 18=55
    => -[-x + (13 – 142)] = 55 – 18
    => -(-x – 129) = 37
    => x + 129 = 37
    => x = 37 – 129
    => x = -92
    Vậy x = -92

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