2x+(x+3)+(x-1)=42

Solution for 2x+(x+3)+(x-1)=42 equation:

Simplifying
2x + (x + 3) + (x + -1) = 42

Reorder the terms:
2x + (3 + x) + (x + -1) = 42

Remove parenthesis around (3 + x)
2x + 3 + x + (x + -1) = 42

Reorder the terms:
2x + 3 + x + (-1 + x) = 42

Remove parenthesis around (-1 + x)
2x + 3 + x + -1 + x = 42

Reorder the terms:
3 + -1 + 2x + x + x = 42

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

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

Combine like terms: 3x + x = 4x
2 + 4x = 42

Solving
2 + 4x = 42

Solving for variable 'x'.

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

Add '-2' to each side of the equation.
2 + -2 + 4x = 42 + -2

Combine like terms: 2 + -2 = 0
0 + 4x = 42 + -2
4x = 42 + -2

Combine like terms: 42 + -2 = 40
4x = 40

Divide each side by '4'.
x = 10

Simplifying
x = 10