Question

3(x+2)=-x-6


4(x-1)=2(x+3)

Answer 1

Resposta:

$x = -3$

  e

$x = 5$

Explicação passo-a-passo:

$3(x + 2) = -x - 6$

$3x + 6 = -x - 6$

$3x + x = -6 - 6$

$4x = -12$

$x = -12/4$

$x = -3$

$4(x - 1) = 2(x + 3)$

$4x - 4 = 2x + 6$

$4x - 2x = 6 + 4$

$2x = 10$

$x = 10/2$

$x = 5$

Answer 2

• Letra A

$\sf 3(x + 2) = - x - 6$

$\sf 3x + 6 = - x - 6$

$\sf 3x + x = - 6 - 6$

$\sf 4x = - 12$

$\sf x = \dfrac{ - 12}{ \: \: \: 4}$

$\red{\boxed{\sf x = - 3}}$

• Letra B

$\sf 4(x - 1) = 2(x + 3)$

$\sf 4x - 4 = 2x + 6$

$\sf 4x - 2x = 6 + 4$

$\sf 2x = 10$

$\sf x = \dfrac{10}{2}$

$\red{\boxed{\sf x = 5}}$