x+(x+2)+(x+4)=42

Solution for x+(x+2)+(x+4)=42 equation:

Simplifying
x + (x + 2) + (x + 4) = 42

Reorder the terms:
x + (2 + x) + (x + 4) = 42

Remove parenthesis around (2 + x)
x + 2 + x + (x + 4) = 42

Reorder the terms:
x + 2 + x + (4 + x) = 42

Remove parenthesis around (4 + x)
x + 2 + x + 4 + x = 42

Reorder the terms:
2 + 4 + x + x + x = 42

Combine like terms: 2 + 4 = 6
6 + x + x + x = 42

Combine like terms: x + x = 2x
6 + 2x + x = 42

Combine like terms: 2x + x = 3x
6 + 3x = 42

Solving
6 + 3x = 42

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 = 42 + -6

Combine like terms: 6 + -6 = 0
0 + 3x = 42 + -6
3x = 42 + -6

Combine like terms: 42 + -6 = 36
3x = 36

Divide each side by '3'.
x = 12

Simplifying
x = 12