(X-1)+x+(x+1)=42

Solution for (X-1)+x+(x+1)=42 equation:

Simplifying
(X + -1) + x + (x + 1) = 42

Reorder the terms:
(-1 + X) + x + (x + 1) = 42

Remove parenthesis around (-1 + X)
-1 + X + x + (x + 1) = 42

Reorder the terms:
-1 + X + x + (1 + x) = 42

Remove parenthesis around (1 + x)
-1 + X + x + 1 + x = 42

Reorder the terms:
-1 + 1 + X + x + x = 42

Combine like terms: -1 + 1 = 0
0 + X + x + x = 42
X + x + x = 42

Combine like terms: x + x = 2x
X + 2x = 42

Solving
X + 2x = 42

Solving for variable 'X'.

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

Add '-2x' to each side of the equation.
X + 2x + -2x = 42 + -2x

Combine like terms: 2x + -2x = 0
X + 0 = 42 + -2x
X = 42 + -2x

Simplifying
X = 42 + -2x