2x^4+3x^3-5x+6/x^2+3x-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

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

East black horse $0.25 total budget is $555 it'll cost $115 for other supplies about how many flyers do you think we can buy