1. -5x - 7 + 1 = -5x - 5
-5x -6 = -5x + 5
-5x - 6 + 6 = -5x +5 + 6
-5x = -5x +11
-5x + 5x = -5x + 5x + 11
0 does not equal 11 so there is not solution to number 1 or you can write 0 does not equal 11.
2. 4x - 7 + 2x = 2(3x-3) -1
6x - 7 = 6x -6 -1
6x -7 + 7 = 6x -7 + 7
(6x = 6x) / 6
x = x; this is an identity which means x can be any real number and the value will still be equal.
3. -4x -2 = -2(1 - 4x)
-4x - 2 = -2 + 8x
-4x - 2 + 2 = -2 + 2 + 8x
(-4x = 8x) / -4
x = -2x ; there is no real answer