X+(y+6)=135

Solution for X+(y+6)=135 equation:

Simplifying
X + (y + 6) = 135

Reorder the terms:
X + (6 + y) = 135

Remove parenthesis around (6 + y)
X + 6 + y = 135

Reorder the terms:
6 + X + y = 135

Solving
6 + X + y = 135

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 + y = 135 + -6

Reorder the terms:
6 + -6 + X + y = 135 + -6

Combine like terms: 6 + -6 = 0
0 + X + y = 135 + -6
X + y = 135 + -6

Combine like terms: 135 + -6 = 129
X + y = 129

Add '-1y' to each side of the equation.
X + y + -1y = 129 + -1y

Combine like terms: y + -1y = 0
X + 0 = 129 + -1y
X = 129 + -1y

Simplifying
X = 129 + -1y