Strange maths coincidence $(6\times 9)+(6+9)=69?$ Is this a freak coincidence in maths or there are more of this type of maths calculation?
$$\color{red}{(6\times 9)}+\color{blue}{(6+9)}=69$$
I try to find more, but I can't. Can you?

$$(6 \times 9) + (6 + 9) = 10 \times 6 + 9 = 69$$
Similarly,
$$(n \times 9) + (n + 9) = 10 \times n + 9 = \text{"}n9\text{''},$$
for any one-digit number $n$
