Question

X/9=5/7 помогите задали дах.. !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

Это пропорция х:9=5:7

7х=9*5

7х=45

х=45:7=6 3/7

Answer 2

$frac{x}{9} = frac{5}{7} \ \ 7x = 45 \ \ x = frac{45}{7} = 6 frac{3}{7}$