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

Toán Lớp 6: a) x – 16 = – 25 b) – 36 – x = 15 c) 5x – 15 = – 35 ) 15 – 5( x-1) = 95 e) ( -2) mũ 2. x + (-3) mũ 2 = – 35 f) 2( x-1) – 23 = – 3

Toán Lớp 6: a) x – 16 = – 25
b) – 36 – x = 15
c) 5x – 15 = – 35
) 15 – 5( x-1) = 95
e) ( -2) mũ 2. x + (-3) mũ 2 = – 35
f) 2( x-1) – 23 = – 3 mũ 2

Comments ( 2 )

  1. a) x – 16 = -25
    x = -25 + 16
    x = -9
    Vậy x = -9
    ____________________
    b) -36 – x = 15
    x = -36 – 15
    x = -51
    Vậy x = -51
    _____________________
    c) 5x – 15 = -35
    5x = -35 + 15
    5x = -20
      x = -20 : 5
      x = -4
    Vậy x = -4
    ______________________
    d) 15 – 5(x – 1) = 95
    5(x – 1) = 15 – 95
    5(x – 1) = -80
    x – 1 = -80 : 5
    x – 1 = -16
    x = -16 + 1
    x = -15
    Vậy x = -15
    ____________________________
    e) (-2)^2 . x + (-3)^2 = -35
    4 . x + 9 = -35
    4x = -35 – 9
    4x = -44
      x = -44 : 4
      x = -11
    Vậy x = -11
    ____________________________
    f) 2(x – 1) – 23 = (-3)^2
    2(x – 1) – 23  = 9
    2(x – 1) = 9 + 23
    2(x – 1) = 32
    x – 1 = 32 : 2
    x – 1 = 16
    x = 16 + 1
    x = 17
    Vậy x = 17
    Hoặc nếu đề là : f) 2(x – 1) – 23 = -3^2
    2(x – 1) – 23 = -9
    2(x – 1) = -9 + 23
    2(x – 1) = 14
    x – 1 = 14 : 2
    x – 1 = 7
    x = 7 + 1
    x = 8
    Vậy x = 8

  2. Giải đáp + Lời giải và giải thích chi tiết:
    $a) x – 16 = -25$
    $⇔ x = -25 + 16$
    $⇔ x = -9$
    $——————-$
    $b) -36 – x = 15$
    $⇔ -x = 15 + 36$
    $⇔ -x = 51$
    $⇔x = -51$
    $——————-$
    $c) 5x – 15 = -35$
    $⇔ 5x = -35 + 15$
    $⇔ 5x = -20$
    $⇔ x = -4$
    $——————-$
    $d) 15 – 5 (x-1) = 95$
    $⇔ 15 – 5x + 5 = 95$
    $⇔ -5x = 95 -5 – 15$
    $⇔ -5x = 75$
    $⇔ x – 15$
    $——————-$
    $e) (-2)^2 .x + (-3)^2 = – 35$
    $⇔ 4x + 9 = -35$
    $⇔ 4x = -35 -9$
    $⇔ 4x = -44$
    $⇔ x = -11$
    $——————-$
    $f) 2(x-1) – 23 = -3^2$
    $⇔ 2x – 2 – 23 = -9$
    $⇔ 2x = -9 + 2 + 23$
    $⇔ 2x = 16$
    $⇔ x = 8$
    $JustHood$

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