Answer: associative property of addition
Step-by-step explanation:
Associative property of addition: Adding two numbers will always give the same result regardless of their orders.
- (a+b)+c=a+(b+c)
- IT ALWAYS INVOLVES AT LEAST 3 NUMBERS
Since in (2+x)+3 to 2+(x+3), is only the parentheses-shift and the result is still the same.
Therefore, (2 + x) + 3 = 2 + (x + 3) is associative property of addition.
