6,2(3-2х) =20-(12,4+1,4)

6,2(3-2х) = 20-(12,4+1,4)
6,2 * (3-2х) = 6,2
3-2х = 1
2х = 2
х=1
Проверка:
6,2(3-2) = 20 -(12,4+1,4)
6,2=6,2
Ответ: х=1