X+(X-2)+(X-4)=123

Solution for X+(X-2)+(X-4)=123 equation:

Simplifying
X + (X + -2) + (X + -4) = 123

Reorder the terms:
X + (-2 + X) + (X + -4) = 123

Remove parenthesis around (-2 + X)
X + -2 + X + (X + -4) = 123

Reorder the terms:
X + -2 + X + (-4 + X) = 123

Remove parenthesis around (-4 + X)
X + -2 + X + -4 + X = 123

Reorder the terms:
-2 + -4 + X + X + X = 123

Combine like terms: -2 + -4 = -6
-6 + X + X + X = 123

Combine like terms: X + X = 2X
-6 + 2X + X = 123

Combine like terms: 2X + X = 3X
-6 + 3X = 123

Solving
-6 + 3X = 123

Solving for variable 'X'.

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

Add '6' to each side of the equation.
-6 + 6 + 3X = 123 + 6

Combine like terms: -6 + 6 = 0
0 + 3X = 123 + 6
3X = 123 + 6

Combine like terms: 123 + 6 = 129
3X = 129

Divide each side by '3'.
X = 43

Simplifying
X = 43