5x-4=x x-5=3x x+6=2x 8x-x=14 7x-4=x 6x+x-3=5x

1) 5x-x = -4
4x = 4
x = 1
2) x-3x=5
-2x=5
x=-2,5
3) x-2x = -6
-x = -6
x=6
4)8x -x = 14
7x = 14
x = 2
5) 7x-x = 4
6x = 4
x = 4/6 = 2/3
6)6x + x - 5x = 3
2x = 3
x = 1.5