How do I simplify the expression around the perimeter of the triangle?

Given the function f(x) = log base 4(x+8) , find the value of f^-1(2)

Simonne used the following steps to simplify the given expression. 12 - 3(-2x + 4) step 1: 12 + (–3)·(–2x) + (–3)·(4) step 2: 12 + 6x + (–12) step 3: 12 + (–12) + 6x step 4: 0 + 6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? a. identity property of addition b. inverse property of addition c. associative property of addition d. commutative property of addition

The distributive property allows you to say that 3(x − 1) = 3x −