(3x - 2) * 4 + 15 = 2x
12x - 8 + 15 - 2x = 0
10x + 7 = 0
10x = -7
x = -0,7
ответ: -0,7.
7/9x - 5/18x + 1/4x = 1/6
28/36x - 10/36x + 9/36x = 6/36
27/36x = 1/6
x = 1/6 * 36/27
x = 6/27
x = 2/9
ответ: 2/9.
(3x - 2) * 4 + 15 = 2x
12x - 8 + 15 - 2x = 0
10x + 7 = 0
10x = -7
x = -0,7
ответ: -0,7.
7/9x - 5/18x + 1/4x = 1/6
28/36x - 10/36x + 9/36x = 6/36
27/36x = 1/6
x = 1/6 * 36/27
x = 6/27
x = 2/9
ответ: 2/9.