Question

Resolvendo a equação 2 . (x + 4) = 4x + 11, obtém:

a) x = - 2,4

b) x = -1,5

c) x = -0,5

d) x = 1,2

Answer 1

Explicação passo-a-passo:

2.(x + 4) = 4x + 11

2x + 8 = 4x + 11

2x - 4x = 11 - 8

-2x = 3 .(-1)

2x = -3

x = -3/2

x = -1,5

Letra B

Answer 2

$\sf 2\cdot(X+4)=4x+11\\\\\\2x+8=4x+11\\\\\\{Subtrair\:}8{\:de\:ambos\:os\:lados}\\\\\\2x+8-8=4x+11-8\\\\\\2x=4x+3\\\\\\2x-4x=4x+3-4x\\\\\\-2x=3\\\\\\\dfrac{-2x}{-2}=\dfrac{3}{-2}\\\\\\\to \boxed{\sf x=-\frac{3}{2} \approx-1,5}$