Question

17:5=51:х пропорции​

Answer 1

$\frac{17}{5} = \frac{51}{x} \\ x = \frac{51 \times 5}{17} \\ x = \frac{3 \times 5}{1} \\ x = 15$

Answer 2

17:5=51:х

х=(51×5):17=15

Ответ: х=15