128-x=x

Solution for 128-x=x equation:

Simplifying
128 + -1x = x

Solving
128 + -1x = x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
128 + -1x + -1x = x + -1x

Combine like terms: -1x + -1x = -2x
128 + -2x = x + -1x

Combine like terms: x + -1x = 0
128 + -2x = 0

Add '-128' to each side of the equation.
128 + -128 + -2x = 0 + -128

Combine like terms: 128 + -128 = 0
0 + -2x = 0 + -128
-2x = 0 + -128

Combine like terms: 0 + -128 = -128
-2x = -128

Divide each side by '-2'.
x = 64

Simplifying
x = 64