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

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