Use addition law to solve

4r+(9+s)

To solve the expression 4r + (9 + s) using the addition law, we need to simplify it step by step by combining like terms.

First, let's distribute the addition within the parentheses to both terms inside it:
4r + 9 + s

Next, we can combine the constant terms (9 and s) since they don't have a variable attached to them. So, we have:
4r + 9 + s = 4r + (9 + s) = 4r + 9 + s

Finally, we can combine the variable terms (4r and s) since they have the same variable, 'r'. Therefore, we end up with the final simplified expression:
4r + 9 + s = 4r + s + 9, which cannot be simplified further using the addition law.

So, the solution using the addition law is 4r + s + 9.