18+(x+2)+x=42

Solution for 18+(x+2)+x=42 equation:

Simplifying
18 + (x + 2) + x = 42

Reorder the terms:
18 + (2 + x) + x = 42

Remove parenthesis around (2 + x)
18 + 2 + x + x = 42

Combine like terms: 18 + 2 = 20
20 + x + x = 42

Combine like terms: x + x = 2x
20 + 2x = 42

Solving
20 + 2x = 42

Solving for variable 'x'.

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

Add '-20' to each side of the equation.
20 + -20 + 2x = 42 + -20

Combine like terms: 20 + -20 = 0
0 + 2x = 42 + -20
2x = 42 + -20

Combine like terms: 42 + -20 = 22
2x = 22

Divide each side by '2'.
x = 11

Simplifying
x = 11