Answer: 16!
Explanation:
Simplify the expression (3x + 1) + (15 - 3x) using the distributive property of addition.
(3x + 1) + (15 - 3x) = 3x + 1 + 15 - 3x
Now, we can combine like terms. The x terms cancel out and we are left with:
3x - 3x + 1 + 15 = 16
Therefore, the simplified expression is 16.