(x-1)+x=-1

Solution for (x-1)+x=-1 equation:

Simplifying
(x + -1) + x = -1

Reorder the terms:
(-1 + x) + x = -1

Remove parenthesis around (-1 + x)
-1 + x + x = -1

Combine like terms: x + x = 2x
-1 + 2x = -1

Add '1' to each side of the equation.
-1 + 1 + 2x = -1 + 1

Combine like terms: -1 + 1 = 0
0 + 2x = -1 + 1
2x = -1 + 1

Combine like terms: -1 + 1 = 0
2x = 0

Solving
2x = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Divide each side by '2'.
x = 0

Simplifying
x = 0