The expression (6 x 9) + (6 + 9) equals 69 because of the order of operations in mathematics.
First, we perform the multiplicative operation inside the parentheses: 6 x 9 = 54.
Then, we add the result of the multiplication to the result of the addition inside the parentheses: 54 + (6 + 9) = 54 + 15 = 69.