It has infinite solutions so there is no single solution for the first part
6x - 1 = 2x + 5 + 4x - 6
Add same ( right side )
2x + 4x = 6x
5 - 6 = -1
Put that in to the equation
6x - 1 = 6x - 1
Because of this x could be anything since both sides of the equation are the same