[x+6]9=72

Solution for [x+6]9=72 equation:

Simplifying
[x + 6] * 9 = 72

Reorder the terms:
[6 + x] * 9 = 72

Reorder the terms for easier multiplication:
9[6 + x] = 72
[6 * 9 + x * 9] = 72
[54 + 9x] = 72

Solving
54 + 9x = 72

Solving for variable 'x'.

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

Add '-54' to each side of the equation.
54 + -54 + 9x = 72 + -54

Combine like terms: 54 + -54 = 0
0 + 9x = 72 + -54
9x = 72 + -54

Combine like terms: 72 + -54 = 18
9x = 18

Divide each side by '9'.
x = 2

Simplifying
x = 2