The difference in yards between -2 2/3 and 5 1/3

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

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

Annabelle's homework is 75% it took her three hours how long should she estimate it will take her to complete her homework.