x+x+(3+2x)+(3+2x)=66

Solution for x+x+(3+2x)+(3+2x)=66 equation:

Simplifying
x + x + (3 + 2x) + (3 + 2x) = 66

Remove parenthesis around (3 + 2x)
x + x + 3 + 2x + (3 + 2x) = 66

Remove parenthesis around (3 + 2x)
x + x + 3 + 2x + 3 + 2x = 66

Reorder the terms:
3 + 3 + x + x + 2x + 2x = 66

Combine like terms: 3 + 3 = 6
6 + x + x + 2x + 2x = 66

Combine like terms: x + x = 2x
6 + 2x + 2x + 2x = 66

Combine like terms: 2x + 2x = 4x
6 + 4x + 2x = 66

Combine like terms: 4x + 2x = 6x
6 + 6x = 66

Solving
6 + 6x = 66

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 + 6x = 66 + -6

Combine like terms: 6 + -6 = 0
0 + 6x = 66 + -6
6x = 66 + -6

Combine like terms: 66 + -6 = 60
6x = 60

Divide each side by '6'.
x = 10

Simplifying
x = 10