2/3x + 5/6x - 7/9x = 1/2
2/3x + 5/6x = 4/6x + 5/6x = 9/6x = 1 3/6x = 1 1/2x
1 1/2x - 7/9 = 3/2x - 7/9x = 27/18x - 14/18x = 13/18x
13/18x=1/2
x = 1/2 : 13/18
x = 9/18 : 13/18
x = 9/18 * 18/13
x = 9/13
Надеюсь
2/3x + 5/6x - 7/9x = 1/2
2/3x + 5/6x = 4/6x + 5/6x = 9/6x = 1 3/6x = 1 1/2x
1 1/2x - 7/9 = 3/2x - 7/9x = 27/18x - 14/18x = 13/18x
13/18x=1/2
x = 1/2 : 13/18
x = 9/18 : 13/18
x = 9/18 * 18/13
x = 9/13
Надеюсь