Write an equivalent variable expression.

9(5r 3)

The equivalent variable expression for 9(5r + 3) can be written as 45r + 27.

To write an equivalent variable expression for 9(5r + 3), we can use the distributive property. The distributive property states that when we multiply a number by a sum or difference, we need to multiply the number by each term inside the parentheses separately.

So, multiplying 9 by 5r and 9 by 3 separately, we get:

9 * 5r = 45r
9 * 3 = 27

Now, we can combine these two terms to form the equivalent variable expression.

The equivalent variable expression for 9(5r + 3) is 45r + 27.