Номер 307 1 и 5 пример

Question

Номер 307 1 и 5 пример

---

Answer 1

7х/6 = 49/14
7х/6 = 7/2
7х * 2 = 6 * 7
14х = 42
    х = 3
------------------------------
3/14 =21/2(х+31)
3/14 = 21/(2х + 62)
3 * (2х + 62) = 14 * 21
6х + 186 = 294
6х = 294 - 186
6х = 108
  х = 18