(x+[x+6])*2=60

Solution for (x+[x+6])*2=60 equation:

Simplifying
(x + [x + 6]) * 2 = 60

Reorder the terms:
(x + [6 + x]) * 2 = 60

Remove brackets around [6 + x]
(x + 6 + x) * 2 = 60

Reorder the terms:
(6 + x + x) * 2 = 60

Combine like terms: x + x = 2x
(6 + 2x) * 2 = 60

Reorder the terms for easier multiplication:
2(6 + 2x) = 60
(6 * 2 + 2x * 2) = 60
(12 + 4x) = 60

Solving
12 + 4x = 60

Solving for variable 'x'.

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

Add '-12' to each side of the equation.
12 + -12 + 4x = 60 + -12

Combine like terms: 12 + -12 = 0
0 + 4x = 60 + -12
4x = 60 + -12

Combine like terms: 60 + -12 = 48
4x = 48

Divide each side by '4'.
x = 12

Simplifying
x = 12