Понять как решить (14 - 56: (3+x)) * 7 = 42

(14 - 56 / (3 + х)) * 7 = 42
(14 - 56 / (3 + х)) = 6
- 56 / (3 + х) = 6 - 14
- 56 / (3 + х) = - 8
56 = 8 * (3 + х)
56 = 24 + 8х
56 - 24 = 8х
8х = 32
х = 32 / 8
х = 4