Answer:
8
Step-by-step explanation:
8r - 4(2r + 1) + 4
First, you have to use the distributive property to solve what's inside the parenthesees:
4(2r) + 4(1) = 8r + 4
Now, the problem is:
8r - 8r + 4 + 4
When we subtract 8r - 8r, we get 0. Therefore the variable r is gone since the coefficient is 0.
The problem now is:
4 + 4
We get the answer of 8.
Sorry if this explanation is bad, but i hope this helps!
