Final answer:
The property shown in the equation is the Associative Property of Addition, which states that the grouping of numbers does not affect the sum when adding three or more numbers.(Option A)
Step-by-step explanation:
The equation illustrates the Associative Property of Addition. This property asserts that when adding three or more numbers, the grouping of terms does not alter the overall sum. In the provided expression, grouping [(5 + (-3x)) + 4] is equivalent to [5 + ((-3x) + 4)].
Thus, the equation 5 + [(-3x + 4] = [5 + (-3x)] + 4 exemplifies the Associative Property of Addition, showcasing the interchangeability of grouped terms without affecting the result. This fundamental property contributes to simplifying expressions and is a fundamental concept in elementary algebra.