Associative property. It states that you can add or multiply numbers no matter in what order they are or how they are grouped.
Hope that helps.
Answer:
Step-by-step explanation:
X = 8
y = 4 + x + 6
(Replace the varibales)
y = 4 + 8 + 6
(Add)
y = 18
So the value of y is 18.