Question

determinar o valor de x na proporção 8x/3=(x-4)/2

Answer 1

8x (x - 4)

---- = -------

3 2

8x . 2 = 3 . (x - 4)

16x = 3x - 12

16x - 3x = - 12

13x = - 12

x = - 12

---

13

Answer 2

Resposta:

$\dfrac{8x}{3}=\dfrac{x-4}{2}\\ \\ multiplica~~cruzado\\ \\ 16x=3.(x-4)\\ \\ 16x=3x-12\\ \\ 16x-3x=-12\\ \\ 13x=-12\\ \\\boxed{ x=-\dfrac{12}{13}}$