Question

–(42 – 9x) = 100 + 11x
25 + 2x = 78 – (13 – x).
12 – (5 – 3x) = 20 – (11x + 13)
5x – 4 (10 – x) = 2(x – 2) + 3x
si puede ser hoy plis

Answer 1

Resposta:

–(42 – 9x) = 100 + 11x

-42 +9x = 100 + 11x

9x - 11x = 100 + 42

    - 2x = 142

        x = 142/-2

        x = - 71

25 + 2x = 78 – (13 – x).

25 + 2x = 78 -14 +x

2x -x = 78 -14 -25

   x =  78 - 39

   x = 39

12 – (5 – 3x) = 20 – (11x + 13)

12 -5 +3x = 20 -11x -13

3x + 11x = 20 -13 -12 +5

    14x  =      7       - 7

    14x  = 0

        x = 0

5x – 4 (10 – x) = 2(x – 2) + 3x

5x - 40 +x = 2x -4 +3x

5x +x -3x = -4 +40

      3x     =  36

        x     = 36 / 3

        x     = 12

   

Explicação passo a passo:

Answer 2

Resposta passo a passo:

–(42 – 9x) = 100 + 11x

–(100 + 42 – 9x) = 11x

–(142 – 9x) = 11x

–142 + 9x = 11x

–142 = 11x – 9x

2x = –142

x = –142 / 2

x = –71

25 + 2x = 78 – (13 – x)

2x = 78 – (25 + 13 – x)

2x = 78 – (38 – x)

2x = 78 – 38 + x

2x = 40 + x

2x – x = 40

x = 40

12 – (5 – 3x) = 20 – (11x + 13)

– (5 – 3x) = 20 – (11x + 13 + 12)

– (5 – 3x) = 20 – (11x + 25)

– (20 + 5 – 3x) = – (11x + 25)

– (25 – 3x) = – (11x + 25)

25 – 3x = 11x + 25

– 3x = 11x

11x + 3x = 0

14x = 0

x = 0/14

x = 0

5x – 4 (10 – x) = 2(x – 2) + 3x

5x – 3x = 2(x – 2) + 4 (10 – x)

2x = 2(x – 2) + 4 (10 – x)

x = [2(x – 2) + 4 (10 – x)] / 2

x = x – 2 + 2(10 – x)

x = x – 2 + 20 – 2x

x = x + 18 – 2x

x = –x + 18

x + x = 18

2x = 18

x = 18 / 2

x = 9