Question

Resolva a inequação: 2 (x + 3) > 5 (3x + 1)

a) x < 1/13

b) x < 1/14

c) x < 1/15

d)x < 1/11

e) x > 1/13
Com contas pfv

Answer 1

Resposta:

$2(x + 3) > 5(3x + 1) \\ 2x + 6 > 15x + 5 \\ 2x - 15x > 5 - 6 \\ - 13x > - 1 \\ 13x < 1 \\ x < \frac{1}{13}$

logo a alternativa correta é (A)