X+3-9-x=0

Solution for X+3-9-x=0 equation:

Simplifying
X + 3 + -9 + -1x = 0

Reorder the terms:
3 + -9 + X + -1x = 0

Combine like terms: 3 + -9 = -6
-6 + X + -1x = 0

Solving
-6 + X + -1x = 0

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 + X + 6 + -1x = 0 + 6

Reorder the terms:
-6 + 6 + X + -1x = 0 + 6

Combine like terms: -6 + 6 = 0
0 + X + -1x = 0 + 6
X + -1x = 0 + 6

Combine like terms: 0 + 6 = 6
X + -1x = 6

Add 'x' to each side of the equation.
X + -1x + x = 6 + x

Combine like terms: -1x + x = 0
X + 0 = 6 + x
X = 6 + x

Simplifying
X = 6 + x