Question

resolva a proporção 3/4/ 2x = 1/5/1/2

Answer 1

$\frac{ \frac{3}{4} }{2x} = \frac{ \frac{1}{5} }{ \frac{1}{2} } \\ \frac{3}{4} \times \frac{1}{2x} = \frac{1}{5} \times \frac{2}{1} \\ \frac{3}{8x} = \frac{2}{5} \\ 16x = 15 \\ x = \frac{15}{16}$

Answer 2

3/4 : 2x = 1/5 : 1/2;
3/4 . 1/2 = 2x. 1/5;
3/8 = 2x/5;
3.5 = 2x.8;
15 = 16x;
16x =15;
x =15/16