- 8 * (3х - 1) = 5 * (7 - 4х)
- 24х + 8 = 35 - 20х
- 24х + 20х = 35 - 8
- 4х = 27
х = 27 : (- 4)
х = - 6,75
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- 8 * (3 * (-6,75) - 1) = 5 * (7 - 4 * (-6,75))
- 8 * (- 20,25 - 1) = 5 * (7 - (- 27))
- 8 * (- 21,25) = 5 * 34
170 = 170
(х - 4) - (2х + 5) = 18
х - 4 - 2х - 5 = 18
х - 2х = 18 + 4 + 5
- х = 27
х = - 27
------------------------------------------------
((- 27) - 4) - (2 * (- 27) + 5) = 18
- 31 - (- 54 + 5) = 18
- 31 - (- 49) = 18
- 31 + 49 = 18
18 = 18
8 * (2 - 5х) = 5 - (4х + 11)
16 - 40х = 5 - 4х - 11
- 40х + 4х = 5 - 11 - 16
- 36х = - 22
х = (- 22) : (- 36)
х = 22/38 = 11/18
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8 * (2 - 5 * 11/18) = 5 - (4 * 11/18 + 11)
8 * (2 - 3 1/18) = 5 - (2 4/9 + 11)
8 * (- 1 1/18) = 5 - 13 4/9
- 8 4/9 = - 8 4/9
6 * (4х + 2) - 3 = 7 * (1 - х) + 9
24х + 12 - 3 = 7 - 7х + 9
24х + 7х = 7 + 9 - 12 + 3
31х = 7
х = 7 : 31
х = 7/31
-----------------------------------------------------
6 * (4 * 7/31 + 2) - 3 = 7 * (1 - 7/31) + 9
6 * (28/31 + 2) - 3 = 7 * 24/31 + 9
6 * 90/31 - 3 = 5 13/31 + 9
17 13/31 - 3 = 14 13/31
14 13/31 = 14 13/31