Question

O valor de "x" na equação -15 - (2x + 8) = 7x + (13 - 5x) é: *

Answer 1

Resposta:

x = -9

Explicação passo-a-passo:

--> -15 - (2x + 8) = 7x + (13 - 5x)

--> -15 -2x -8 = 7x + 13 -5x

--> -2x -23 = 2x + 13

--> -2x -2x = 13 + 23

--> -4x = 36

--> x = 36/(-4)

--> x = -9

Answer 2

Oi...

- 15 - (2x + 8) = 7x + (13 - 5x)

- 15 - 2x - 8 = 7x + (13 - 5x)

- 23 - 2x = 7x + (13 - 5x)

- 2x - 23 = 7x + (13 - 5x)

- 2x - 23 = 7x + (- 5x + 13)

- 2x - 23 = 7x + (-5x + 13)

- 2x - 23 = 2x + 13

- 2x - 23 + 23 = 2x + 13 + 23

- 2x = 2x + 13 + 23

- 2x = 2x + 36

- 2x - 2x = 2x + 36 - 2x

- 4x = 2x + 36 - 2x

- 4x = 36

- 4x/-4 = 36/-4

x = 36/-4

x = - 9