Question

determinar o valor de x nessa proporção 1/2 sobre 3/4=2/7 sobre 7/x

Answer 1

$\frac{1}{2}$/$\frac{3}{4}$=$\frac{2}{7}$/$\frac{7}{x}$
1/2*4/3=2/7*x/7
4/6=2x/14
4/6=x/7
x=4/6*7
x=28/6
x=14/3