2*(3X - 1) + 9 = 5 - 7X
6X - 2 + 9 = 5 - 7X
6X + 7 = 5 - 7X
6X + 7Х = 5 - 7
13Х = -2
Х = -2/13
ответ: -2/13
6х-2+9=5-7х
6х+7х=5-9+2
13х=-2:13
х=-2/13
2*(3X - 1) + 9 = 5 - 7X
6X - 2 + 9 = 5 - 7X
6X + 7 = 5 - 7X
6X + 7Х = 5 - 7
13Х = -2
Х = -2/13
ответ: -2/13
6х-2+9=5-7х
6х+7х=5-9+2
13х=-2:13
х=-2/13