Question

7/12:х=3/20:3/10 ......................

Answer 1

$frac{7}{12} :x = frac{3}{20} : frac{3}{10}$
$frac{7}{12x} = frac{3*10}{20*3}$
$frac{7}{12x} = frac{1}{2}$
12x=7*2
12х=14
х=$frac{14}{12}$
х=$1 frac{1}{6}$