The given equation is
3(4z + 4) = 36
The first step is to open the bracket by multiplying the terms inside the bracket by the term outside. It becomes
3 * 4z + 3 * 4 = 36
12z + 12 = 36
Subtracting 12 from both sides of the equation, it becomes
12z + 12 - 12 = 36 - 12
12z = 24
z = 24/12
z = 2
