Question

me ajudem com proporcao
1/2 = 9
x 4

Answer 1

Cálculo :

$\frac{1}{2} =9*4*x \\ \\ \frac{1}{2}=36x \\ \\ 1=2*(36x) \\ 1=72x \\ x= \frac{1}{72}$

R: x=1/72

Answer 2

   1/2 = 9
     x     4
  
  9x = 1.4 ==> 9x = 4
           2                  2
   9x = 2 ==> x = 2
                          9