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?
•identity property of addition
•inverse property of addition
•associative property of addition
•commutative property of addition