2(x+x+2)=78

Solution for 2(x+x+2)=78 equation:

Simplifying
2(x + x + 2) = 78

Reorder the terms:
2(2 + x + x) = 78

Combine like terms: x + x = 2x
2(2 + 2x) = 78
(2 * 2 + 2x * 2) = 78
(4 + 4x) = 78

Solving
4 + 4x = 78

Solving for variable 'x'.

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

Add '-4' to each side of the equation.
4 + -4 + 4x = 78 + -4

Combine like terms: 4 + -4 = 0
0 + 4x = 78 + -4
4x = 78 + -4

Combine like terms: 78 + -4 = 74
4x = 74

Divide each side by '4'.
x = 18.5

Simplifying
x = 18.5