x+(x+1)+(x+2)=42

Solution for x+(x+1)+(x+2)=42 equation:

Simplifying
x + (x + 1) + (x + 2) = 42

Reorder the terms:
x + (1 + x) + (x + 2) = 42

Remove parenthesis around (1 + x)
x + 1 + x + (x + 2) = 42

Reorder the terms:
x + 1 + x + (2 + x) = 42

Remove parenthesis around (2 + x)
x + 1 + x + 2 + x = 42

Reorder the terms:
1 + 2 + x + x + x = 42

Combine like terms: 1 + 2 = 3
3 + x + x + x = 42

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

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

Solving
3 + 3x = 42

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -3 + 3x = 42 + -3

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

Combine like terms: 42 + -3 = 39
3x = 39

Divide each side by '3'.
x = 13

Simplifying
x = 13